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"For coding interview preparation, LeetCode is one of the best online resource providing a rich library of more than 300 real coding interview questions for you to practice from using one of the 7 supported languages - C, C++, Java, Python, C#, JavaScript, Ruby."

Binary Search II
Dynamic Programming I
Programming Skills I
Programming Skills II
Graph Theory I
SQL I
Level 1
Level 2
Udemy
Top Interview 150
Data Structure I
Data Structure II
Algorithm I
Algorithm II
Binary Search I

Binary Search II

Day 1

Day 2

Day 3


0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 4

Day 5


0287	Find the Duplicate Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Big_O_Time_O(n)_Space_O(n)	2	97.52

Day 6

Day 7

Day 8


0240	Search a 2D Matrix II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1)	5	99.92

Day 9

Day 10

Day 11

Day 12

Day 13

Day 14

Day 15

Day 16

Day 17

Day 18

Day 19

Day 20

Dynamic Programming I

Day 1

Day 2


0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 3


0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 4


0055	Jump Game	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0045	Jump Game II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 5


0053	Maximum Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32

Day 6


0152	Maximum Product Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	92.74

Day 7


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78

Day 8

Day 9


0139	Word Break	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0042	Trapping Rain Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 10

Day 11


0096	Unique Binary Search Trees	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 12

Day 13

Day 14

Day 15


0062	Unique Paths	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(mn)_Space_O(mn)	0	100.00

Day 16


0064	Minimum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0221	Maximal Square	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	6	97.07

Day 17


0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 18


0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 19


1143	Longest Common Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(nm)_Space_O(nm)	19	89.05
0072	Edit Distance	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19

Day 20


0322	Coin Change	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 21

Programming Skills I

Day 1 Basic Data Type

Day 2 Operator

Day 3 Conditional Statements

Day 4 Loop

Day 5 Function

Day 6 Array


0283	Move Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	2	83.99

Day 7 Array

Day 8 String

Day 9 String

Day 10 Linked List and Tree


0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H)	0	100.00

Day 11 Containers and Libraries

Day 12 Class and Object

Programming Skills II

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6


0739	Daily Temperatures	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(n)	8	96.83

Day 7


0048	Rotate Image	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00

Day 8

Day 9

Day 10

Day 11


0049	Group Anagrams	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61

Day 12


0438	Find All Anagrams in a String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)	3	99.83

Day 13

Day 14


0138	Copy List with Random Pointer	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00

Day 15


0002	Add Two Numbers	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task	1	100.00

Day 16

Day 17

Day 18


0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Day 19

Day 20

Graph Theory I

Day 1 Matrix Related Problems


0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 2 Matrix Related Problems

Day 3 Matrix Related Problems

Day 4 Matrix Related Problems

Day 5 Matrix Related Problems

Day 6 Matrix Related Problems

Day 7 Standard Traversal

Day 8 Standard Traversal

Day 9 Standard Traversal

Day 10 Standard Traversal

Day 11 Breadth First Search

Day 12 Breadth First Search

Day 13 Graph Theory

Day 14 Graph Theory

SQL I

Day 1 Select

Day 2 Select and Order

Day 3 String Processing Functions

Day 4 Union and Select

Day 5 Union

Day 6 Union

Day 7 Function

Day 8 Function

Day 9 Control of Flow

Day 10 Where

Level 1

Day 1 Prefix Sum

Day 2 String

Day 3 Linked List


0021	Merge Two Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00
0206	Reverse Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1)	0	100.00

Day 4 Linked List


0142	Linked List Cycle II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00

Day 5 Greedy


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78

Day 6 Tree


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19

Day 7 Binary Search

Day 8 Binary Search Tree


0098	Validate Binary Search Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Day 9 Graph/BFS/DFS


0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 10 Dynamic Programming


0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 11 Dynamic Programming


0062	Unique Paths	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(mn)_Space_O(mn)	0	100.00

Day 12 Sliding Window/Two Pointer


0438	Find All Anagrams in a String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)	3	99.83

Day 13 Hashmap


0001	Two Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90

Day 14 Stack


0394	Decode String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 15 Heap

Level 2

Day 1 Implementation/Simulation

Day 2 String

Day 3 Linked List


0019	Remove Nth Node From End of List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)	0	100.00
0234	Palindrome Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Two_Pointers, Stack, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)	4	84.46

Day 4 Linked List


0148	Sort List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(log(N))_Space_O(log(N))	9	93.90

Day 5 Greedy

Day 6 Tree


0226	Invert Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 7 Tree


0543	Diameter of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0437	Path Sum III	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	2	100.00

Day 8 Binary Search


0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 9 Binary Search Tree


0230	Kth Smallest Element in a BST	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 10 Graph/BFS/DFS

Day 11 Graph/BFS/DFS

Day 12 Dynamic Programming


0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	0	100.00
0322	Coin Change	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 13 Dynamic Programming


0416	Partition Equal Subset Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Big_O_Time_O(nsums)_Space_O(nsums)	5	99.88
0152	Maximum Product Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	92.74

Day 14 Sliding Window/Two Pointer


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0076	Minimum Window Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2	99.83

Day 15 Tree


0101	Symmetric Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Day 16 Design


0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54
0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05

Day 17 Interval


0056	Merge Intervals	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Day 18 Stack

Day 19 Union Find

Day 20 Brute Force/Backtracking


0039	Combination Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0046	Permutations	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Udemy

Udemy Integers


0136	Single Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0007	Reverse Integer	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_Interview_Questions, Math	0	100.00
0009	Palindrome Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Math	4	100.00

Udemy Strings


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0020	Valid Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19
0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82
0394	Decode String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n)	0	100.00
0049	Group Anagrams	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61

Udemy Binary Search


0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00

Udemy Arrays


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78
0283	Move Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	2	83.99
0001	Two Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90
0189	Rotate Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0055	Jump Game	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0075	Sort Colors	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0238	Product of Array Except Self	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, Big_O_Time_O(n^2)_Space_O(n)	1	99.66
0041	First Missing Positive	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n)	1	100.00
0239	Sliding Window Maximum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Big_O_Time_O(n*k)_Space_O(n+k)	26	95.89

Udemy Two Pointers


0042	Trapping Rain Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00
0015	3Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Udemy Famous Algorithm


0053	Maximum Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32
0169	Majority Element	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89

Udemy Sorting Algorithms

Udemy 2D Arrays/Matrix


0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0048	Rotate Image	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00
0073	Set Matrix Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1)	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Udemy Linked List


0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0024	Swap Nodes in Pairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)	0	100.00
0142	Linked List Cycle II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0141	Linked List Cycle	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0206	Reverse Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1)	0	100.00
0021	Merge Two Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00
0160	Intersection of Two Linked Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(M+N)_Space_O(1)	1	99.92
0234	Palindrome Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Two_Pointers, Stack, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)	4	84.46
0138	Copy List with Random Pointer	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0025	Reverse Nodes in k-Group	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)	0	100.00
0146	LRU Cache	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Big_O_Time_O(1)_Space_O(capacity)	40	98.20

Udemy Tree Stack Queue


0094	Binary Tree Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n)	0	100.00
0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19
0543	Diameter of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0226	Invert Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H)	0	100.00
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	0	100.00
0098	Validate Binary Search Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	6	100.00

Udemy Trie and Heap


0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05

Udemy Graph


0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Udemy Dynamic Programming


0139	Word Break	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0152	Maximum Product Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	92.74
0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	0	100.00
0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0064	Minimum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75
1143	Longest Common Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(nm)_Space_O(nm)	19	89.05
0072	Edit Distance	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0010	Regular Expression Matching	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_Interview_Questions, String, Dynamic_Programming, Recursion, Big_O_Time_O(mn)_Space_O(mn)	1	100.00

Udemy Backtracking/Recursion


0022	Generate Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0039	Combination Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0078	Subsets	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n)	0	100.00
0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0046	Permutations	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Udemy Bit Manipulation


0338	Counting Bits	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Dynamic_Programming, Bit_Manipulation, Big_O_Time_O(num)_Space_O(num)	2	96.37

Udemy Design


0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Top Interview 150

Top Interview 150 Array/String


0169	Majority Element	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89
0189	Rotate Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78
0055	Jump Game	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0045	Jump Game II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00
0238	Product of Array Except Self	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, Big_O_Time_O(n^2)_Space_O(n)	1	99.66
0042	Trapping Rain Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00
0006	Zigzag Conversion	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	String	2	99.71

Top Interview 150 Two Pointers


0011	Container With Most Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3	96.01
0015	3Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Top Interview 150 Sliding Window


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0076	Minimum Window Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2	99.83

Top Interview 150 Matrix


0048	Rotate Image	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00
0073	Set Matrix Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1)	0	100.00

Top Interview 150 Hashmap


0049	Group Anagrams	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61
0001	Two Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90
0128	Longest Consecutive Sequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Big_O_Time_O(N_log_N)_Space_O(1)	14	98.89

Top Interview 150 Intervals


0056	Merge Intervals	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Top Interview 150 Stack


0020	Valid Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19
0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Top Interview 150 Binary Tree General


0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H)	0	100.00
0226	Invert Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0101	Symmetric Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Big_O_Time_O(N)_Space_O(N)	1	96.33
0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	0	100.00
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	6	100.00

Top Interview 150 Binary Tree BFS


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19

Top Interview 150 Binary Search Tree


0230	Kth Smallest Element in a BST	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0098	Validate Binary Search Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Top Interview 150 Graph General


0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24
0207	Course Schedule	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Big_O_Time_O(N)_Space_O(N)	3	99.99

Top Interview 150 Graph BFS

Top Interview 150 Trie


0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05

Top Interview 150 Backtracking


0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0046	Permutations	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08
0039	Combination Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0022	Generate Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0079	Word Search	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64	98.51

Top Interview 150 Divide and Conquer


0148	Sort List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(log(N))_Space_O(log(N))	9	93.90
0023	Merge k Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(knlog(k))_Space_O(log(k))	1	99.86

Top Interview 150 Kadane's Algorithm


0053	Maximum Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32

Top Interview 150 Binary Search


0035	Search Insert Position	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00
0004	Median of Two Sorted Arrays	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Big_O_Time_O(log(min(N,M)))_Space_O(1), AI_can_be_used_to_solve_the_task	1	100.00

Top Interview 150 Heap


0215	Kth Largest Element in an Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Big_O_Time_O(n*log(n))_Space_O(log(n))	5	70.82
0295	Find Median from Data Stream	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n*log_n)_Space_O(n)	83	99.56

Top Interview 150 Bit Manipulation


0136	Single Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86

Top Interview 150 Math


0009	Palindrome Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Math	4	100.00

Top Interview 150 1D DP


0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	0	100.00
0139	Word Break	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0322	Coin Change	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59
0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Top Interview 150 Multidimensional DP


0064	Minimum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82
0072	Edit Distance	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0221	Maximal Square	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	6	97.07

Data Structure I

Day 1 Array


0053	Maximum Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32

Day 2 Array


0001	Two Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90

Day 3 Array


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78

Day 4 Array

Day 5 Array


0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00

Day 6 String

Day 7 Linked List


0141	Linked List Cycle	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0021	Merge Two Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00

Day 8 Linked List


0206	Reverse Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1)	0	100.00

Day 9 Stack Queue


0020	Valid Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19

Day 10 Tree


0094	Binary Tree Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 11 Tree


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H)	0	100.00
0101	Symmetric Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Day 12 Tree


0226	Invert Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 13 Tree

Day 14 Tree


0098	Validate Binary Search Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Data Structure II

Day 1 Array


0136	Single Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0169	Majority Element	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89
0015	3Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Day 2 Array


0075	Sort Colors	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Day 3 Array


0048	Rotate Image	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00

Day 4 Array


0240	Search a 2D Matrix II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1)	5	99.92

Day 5 Array


0238	Product of Array Except Self	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, Big_O_Time_O(n^2)_Space_O(n)	1	99.66
0560	Subarray Sum Equals K	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Big_O_Time_O(n)_Space_O(n)	22	95.17

Day 6 String

Day 7 String


0763	Partition Labels	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	String, Hash_Table, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	2	100.00

Day 8 String


0049	Group Anagrams	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61

Day 9 String


0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 10 Linked List


0002	Add Two Numbers	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task	1	100.00
0142	Linked List Cycle II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00

Day 11 Linked List


0160	Intersection of Two Linked Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(M+N)_Space_O(1)	1	99.92

Day 12 Linked List


0024	Swap Nodes in Pairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 13 Linked List


0025	Reverse Nodes in k-Group	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)	0	100.00

Day 14 Stack Queue


0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Day 15 Tree


0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Big_O_Time_O(N)_Space_O(N)	1	96.33

Day 16 Tree

Day 17 Tree


0230	Kth Smallest Element in a BST	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 18 Tree


0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	6	100.00

Day 19 Graph

Day 20 Heap Priority Queue


0215	Kth Largest Element in an Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Big_O_Time_O(n*log(n))_Space_O(log(n))	5	70.82
0347	Top K Frequent Elements	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Big_O_Time_O(n*log(n))_Space_O(k)	9	97.30

Day 21 Heap Priority Queue

Algorithm I

Day 1 Binary Search


0035	Search Insert Position	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 2 Two Pointers


0189	Rotate Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 3 Two Pointers


0283	Move Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	2	83.99

Day 4 Two Pointers

Day 5 Two Pointers


0019	Remove Nth Node From End of List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)	0	100.00

Day 6 Sliding Window


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59

Day 7 Breadth First Search Depth First Search

Day 8 Breadth First Search Depth First Search

Day 9 Breadth First Search Depth First Search

Day 10 Recursion Backtracking


0021	Merge Two Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00
0206	Reverse Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1)	0	100.00

Day 11 Recursion Backtracking


0046	Permutations	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Day 12 Dynamic Programming


0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 13 Bit Manipulation

Day 14 Bit Manipulation


0136	Single Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86

Algorithm II

Day 1 Binary Search


0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	100.00
0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	100.00

Day 2 Binary Search


0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00

Day 3 Two Pointers


0015	3Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Day 4 Two Pointers


0011	Container With Most Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3	96.01

Day 5 Sliding Window


0438	Find All Anagrams in a String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)	3	99.83

Day 6 Breadth First Search Depth First Search


0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 7 Breadth First Search Depth First Search

Day 8 Breadth First Search Depth First Search

Day 9 Recursion Backtracking


0078	Subsets	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n)	0	100.00

Day 10 Recursion Backtracking


0039	Combination Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99

Day 11 Recursion Backtracking


0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0022	Generate Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0079	Word Search	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64	98.51

Day 12 Dynamic Programming


0055	Jump Game	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00

Day 13 Dynamic Programming


0045	Jump Game II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00
0062	Unique Paths	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(mn)_Space_O(mn)	0	100.00

Day 14 Dynamic Programming


0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 15 Dynamic Programming


0139	Word Break	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42

Day 16 Dynamic Programming


0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 17 Dynamic Programming


1143	Longest Common Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(nm)_Space_O(nm)	19	89.05

Day 18 Dynamic Programming


0072	Edit Distance	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0322	Coin Change	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 19 Bit Manipulation

Day 20 Others

Day 21 Others

Binary Search I

Day 1

Day 2


0035	Search Insert Position	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 3

Day 4

Day 5


0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 6

Day 7

Day 8


0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00

Day 9

Day 10

Day 11


0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 12


0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00

Algorithms

#	Title	Difficulty	Tag	Time, ms	Time, %
1143	Longest Common Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_17_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(nm)_Space_O(nm)	19
0763	Partition Labels	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	String, Hash_Table, Greedy, Two_Pointers, Data_Structure_II_Day_7_String, Big_O_Time_O(n)_Space_O(1)	2
0739	Daily Temperatures	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Stack, Monotonic_Stack, Programming_Skills_II_Day_6, Big_O_Time_O(n)_Space_O(n)	8
0647	Palindromic Substrings	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n)	2
0560	Subarray Sum Equals K	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Data_Structure_II_Day_5_Array, Big_O_Time_O(n)_Space_O(n)	22
0543	Diameter of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n)	0
0494	Target Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Array, Dynamic_Programming, Backtracking, Big_O_Time_O(n(sum+s))_Space_O(n(sum+s))	4
0438	Find All Anagrams in a String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Programming_Skills_II_Day_12, Level_1_Day_12_Sliding_Window/Two_Pointer, Big_O_Time_O(n+m)_Space_O(1)	3
0437	Path Sum III	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Big_O_Time_O(n)_Space_O(n)	2
0416	Partition Equal Subset Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Level_2_Day_13_Dynamic_Programming, Big_O_Time_O(nsums)_Space_O(nsums)	5
0394	Decode String	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Stack, Recursion, Level_1_Day_14_Stack, Udemy_Strings, Big_O_Time_O(n)_Space_O(n)	0
0347	Top K Frequent Elements	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(k)	9
0338	Counting Bits	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Dynamic_Programming, Bit_Manipulation, Udemy_Bit_Manipulation, Big_O_Time_O(num)_Space_O(num)	2
0322	Coin Change	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(m*n)_Space_O(amount)	12
0300	Longest Increasing Subsequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n*log_n)_Space_O(n)	3
0295	Find Median from Data Stream	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Top_Interview_150_Heap, Big_O_Time_O(n*log_n)_Space_O(n)	83
0287	Find the Duplicate Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Binary_Search_II_Day_5, Big_O_Time_O(n)_Space_O(n)	2
0283	Move Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Programming_Skills_I_Day_6_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1)	2
0240	Search a 2D Matrix II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Data_Structure_II_Day_4_Array, Binary_Search_II_Day_8, Big_O_Time_O(n+m)_Space_O(1)	5
0239	Sliding Window Maximum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Udemy_Arrays, Big_O_Time_O(n*k)_Space_O(n+k)	26
0238	Product of Array Except Self	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, Data_Structure_II_Day_5_Array, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n^2)_Space_O(n)	1
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_Space_O(n)	6
0234	Palindrome Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Two_Pointers, Stack, Linked_List, Recursion, Level_2_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1)	4
0230	Kth Smallest Element in a BST	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_17_Tree, Level_2_Day_9_Binary_Search_Tree, Top_Interview_150_Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0
0226	Invert Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_Space_O(n)	0
0221	Maximal Square	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(mn)_Space_O(mn)	6
0215	Kth Largest Element in an Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Data_Structure_II_Day_20_Heap_Priority_Queue, Top_Interview_150_Heap, Big_O_Time_O(n*log(n))_Space_O(log(n))	5
0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Level_2_Day_16_Design, Udemy_Trie_and_Heap, Top_Interview_150_Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32
0207	Course Schedule	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Top_Interview_150_Graph_General, Big_O_Time_O(N)_Space_O(N)	3
0206	Reverse Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_8_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1)	0
0200	Number of Islands	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS, Udemy_Graph, Top_Interview_150_Graph_General, Big_O_Time_O(MN)_Space_O(MN)	3
0198	House Robber	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Level_2_Day_12_Dynamic_Programming, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n)_Space_O(n)	0
0189	Rotate Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Algorithm_I_Day_2_Two_Pointers, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0
0169	Majority Element	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Data_Structure_II_Day_1_Array, Udemy_Famous_Algorithm, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	1
0160	Intersection of Two Linked Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_11_Linked_List, Udemy_Linked_List, Big_O_Time_O(M+N)_Space_O(1)	1
0155	Min Stack	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Data_Structure_II_Day_14_Stack_Queue, Programming_Skills_II_Day_18, Level_2_Day_16_Design, Udemy_Design, Top_Interview_150_Stack, Big_O_Time_O(1)_Space_O(N)	4
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_I_Day_12, Udemy_Binary_Search, Top_Interview_150_Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0
0152	Maximum Product Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Dynamic_Programming_I_Day_6, Level_2_Day_13_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1
0148	Sort List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Level_2_Day_4_Linked_List, Top_Interview_150_Divide_and_Conquer, Big_O_Time_O(log(N))_Space_O(log(N))	9
0146	LRU Cache	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(1)_Space_O(capacity)	40
0142	Linked List Cycle II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_10_Linked_List, Level_1_Day_4_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1)	0
0141	Linked List Cycle	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_I_Day_7_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(N)_Space_O(1)	0
0139	Word Break	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Algorithm_II_Day_15_Dynamic_Programming, Dynamic_Programming_I_Day_9, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1
0138	Copy List with Random Pointer	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Programming_Skills_II_Day_14, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(N)_Space_O(N)	0
0136	Single Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Data_Structure_II_Day_1_Array, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Integers, Top_Interview_150_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1
0131	Palindrome Partitioning	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(N2^N)_Space_O(2^NN)	7
0128	Longest Consecutive Sequence	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Top_Interview_150_Hashmap, Big_O_Time_O(N_log_N)_Space_O(1)	14
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	0
0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Data_Structure_I_Day_3_Array, Dynamic_Programming_I_Day_7, Level_1_Day_5_Greedy, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(N)_Space_O(1)	1
0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Udemy_Linked_List, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	0
0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	1
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Programming_Skills_I_Day_10_Linked_List_and_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(H)	0
0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_1_Day_6_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_BFS, Big_O_Time_O(N)_Space_O(N)	1
0101	Symmetric Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_2_Day_15_Tree, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(log(N))	0
0098	Validate Binary Search Tree	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0
0096	Unique Binary Search Trees	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Dynamic_Programming_I_Day_11, Big_O_Time_O(n)_Space_O(1)	0
0094	Binary Tree Inorder Traversal	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n)	0
0084	Largest Rectangle in Histogram	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n_log_n)_Space_O(log_n)	9
0079	Word Search	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Top_Interview_150_Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64
0078	Subsets	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Algorithm_II_Day_9_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n*2^n)	0
0076	Minimum Window Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Top_Interview_150_Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2
0075	Sort Colors	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_2_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1)	0
0074	Search a 2D Matrix	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Data_Structure_I_Day_5_Array, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_8, Level_2_Day_8_Binary_Search, Udemy_2D_Arrays/Matrix, Top_Interview_150_Binary_Search, Big_O_Time_O(endRow+endCol)_Space_O(1)	0
0073	Set Matrix Zeroes	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Udemy_2D_Arrays/Matrix, Top_Interview_150_Matrix, Big_O_Time_O(m*n)_Space_O(1)	0
0072	Edit Distance	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(n^2)_Space_O(n2)	3
0070	Climbing Stairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n)_Space_O(n)	0
0064	Minimum Path Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Udemy_Dynamic_Programming, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(mn)_Space_O(mn)	1
0062	Unique Paths	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_15, Level_1_Day_11_Dynamic_Programming, Big_O_Time_O(mn)_Space_O(mn)	0
0056	Merge Intervals	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Data_Structure_II_Day_2_Array, Level_2_Day_17_Interval, Udemy_2D_Arrays/Matrix, Top_Interview_150_Intervals, Big_O_Time_O(n_log_n)_Space_O(n)	7
0055	Jump Game	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_4, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	1
0053	Maximum Subarray	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Data_Structure_I_Day_1_Array, Dynamic_Programming_I_Day_5, Udemy_Famous_Algorithm, Top_Interview_150_Kadane's_Algorithm, Big_O_Time_O(n)_Space_O(1)	1
0051	N-Queens	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(N!)_Space_O(N)	1
0049	Group Anagrams	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_11, Udemy_Strings, Top_Interview_150_Hashmap, Big_O_Time_O(n*k_log_k)_Space_O(n)	6
0048	Rotate Image	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Data_Structure_II_Day_3_Array, Programming_Skills_II_Day_7, Udemy_2D_Arrays/Matrix, Top_Interview_150_Matrix, Big_O_Time_O(n^2)_Space_O(1)	0
0046	Permutations	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1
0045	Jump Game II	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_4, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0
0042	Trapping Rain Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Dynamic_Programming_I_Day_9, Udemy_Two_Pointers, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0
0041	First Missing Positive	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n)	1
0039	Combination Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1
0035	Search Insert Position	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_2, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0
0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_5, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_11, Level_2_Day_8_Binary_Search, Udemy_Binary_Search, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0
0032	Longest Valid Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, String, Dynamic_Programming, Stack, Big_O_Time_O(n)_Space_O(1)	1
0031	Next Permutation	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0
0025	Reverse Nodes in k-Group	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(n)_Space_O(k)	0
0024	Swap Nodes in Pairs	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_12_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1)	0
0023	Merge k Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Top_Interview_150_Divide_and_Conquer, Big_O_Time_O(knlog(k))_Space_O(log(k))	1
0022	Generate Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0
0021	Merge Two Sorted Lists	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(m+n)_Space_O(m+n)	0
0020	Valid Parentheses	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Data_Structure_I_Day_9_Stack_Queue, Udemy_Strings, Top_Interview_150_Stack, Big_O_Time_O(n)_Space_O(n)	2
0019	Remove Nth Node From End of List	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Level_2_Day_3_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(L)_Space_O(L)	0
0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0
0015	3Sum	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_1_Array, Algorithm_II_Day_3_Two_Pointers, Udemy_Two_Pointers, Top_Interview_150_Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29
0011	Container With Most Water	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Algorithm_II_Day_4_Two_Pointers, Top_Interview_150_Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3
0010	Regular Expression Matching	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_Interview_Questions, String, Dynamic_Programming, Recursion, Udemy_Dynamic_Programming, Big_O_Time_O(mn)_Space_O(mn)	1
0009	Palindrome Number	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Easy	Math, Udemy_Integers, Top_Interview_150_Math	4
0008	String to Integer (atoi)	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_Interview_Questions, String	1
0007	Reverse Integer	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_Interview_Questions, Math, Udemy_Integers	0
0006	Zigzag Conversion	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	String, Top_Interview_150_Array/String	2
0005	Longest Palindromic Substring	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Data_Structure_II_Day_9_String, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_17, Udemy_Strings, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(n)_Space_O(n)	7
0004	Median of Two Sorted Arrays	Java Kotlin TypeScript Scala Ruby PHP C# Go Cpp Python Swift Elixir Rust Dart C JavaScript Erlang Racket	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Top_Interview_150_Binary_Search, Big_O_Time_O(log(min(N,M)))_Space_O(1), AI_can_be_used_to_solve_the_task	1
0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript Scala Ruby [PHP](src/main/php/g0001_0100

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