#	Title	Solutions	Video	Difficulty	Tag
1996	The Number of Weak Characters in the Game	Solution		Medium
1995	Count Special Quadruplets	Solution		Easy
1993	Operations on Tree	Solution		Medium	HashTable, DFS, Design, Tree
1992	Find All Groups of Farmland	Solution		Medium
1991	Find the Middle Index in Array	Solution		Easy
1985	Find the Kth Largest Integer in the Array	Solution		Medium
1984	Minimum Difference Between Highest and Lowest of K Scores	Solution		Easy
1981	Minimize the Difference Between Target and Chosen Elements	Solution		Medium	DP
1980	Find Unique Binary String	Solution		Medium
1979	Find Greatest Common Divisor of Array	Solution		Easy
1974	Minimum Time to Type Word Using Special Typewriter	Solution		Easy
1973	Count Nodes Equal to Sum of Descendants	Solution		Medium	Tree, DFS
1971	Find if Path Exists in Graph	Solution		Easy	BFS, DFS, Graph
1968	Array With Elements Not Equal to Average of Neighbors	Solution		Medium
1967	Number of Strings That Appear as Substrings in Word	Solution		Easy
1966	Binary Searchable Numbers in an Unsorted Array	Solution		Medium	Array, Binary Search
1961	Check If String Is a Prefix of Array	Solution		Easy
1957	Delete Characters to Make Fancy String	Solution		Easy	String
1952	Three Divisors	Solution		Easy
1945	Sum of Digits of String After Convert	Solution		Easy
1941	Check if All Characters Have Equal Number of Occurrences	Solution		Easy
1936	Add Minimum Number of Rungs	Solution		Medium
1935	Maximum Number of Words You Can Type	Solution		Easy	String
1933	Check if String Is Decomposable Into Value-Equal Substrings	Solution		Easy	String
1929	Concatenation of Array	Solution		Easy
1926	Nearest Exit from Entrance in Maze	Solution		Medium	DP, DFS, BFS
1925	Count Square Sum Triples	Solution		Easy	Array, Greedy
1920	Build Array from Permutation	Solution		Easy
1913	Maximum Product Difference Between Two Pairs	Solution		Easy	Sort
1910	Remove All Occurrences of a Substring	Solution	📺	Medium	String
1909	Remove One Element to Make the Array Strictly Increasing	Solution		Easy	Array
1904	The Number of Full Rounds You Have Played	Solution		Medium	String, Greedy
1903	Largest Odd Number in String	Solution	📺	Easy	Greedy
1899	Merge Triplets to Form Target Triplet	Solution		Medium	Array, Greedy
1897	Redistribute Characters to Make All Strings Equal	Solution		Easy	String, Greedy
1894	Find the Student that Will Replace the Chalk	Solution		Medium
1893	Check if All the Integers in a Range Are Covered	Solution		Easy	Array, HashTable, Prefix Sum
1891	Cutting Ribbons	Solution		Medium	Array, Binary Search
1886	Determine Whether Matrix Can Be Obtained By Rotation	Solution		Easy	Array
1880	Check if Word Equals Summation of Two Words	Solution		Easy	String
1877	Minimize Maximum Pair Sum in Array	Solution		Medium	Greedy, Sort
1876	Substrings of Size Three with Distinct Characters	Solution		Easy	String
1874	Minimize Product Sum of Two Arrays	Solution		Medium	Array, Greedy, Sorting
1869	Longer Contiguous Segments of Ones than Zeros	Solution		Easy	Array, Two Pointers
1868	Product of Two Run-Length Encoded Arrays	Solution		Medium	Two Pointers
1863	Sum of All Subset XOR Totals	Solution		Easy	Backtracking, Recursion
1862	Sum of Floored Pairs	Solution		Hard	Math
1861	Rotating the Box	Solution	📺	Medium	Array, Two Pointers
1860	Incremental Memory Leak	Solution		Medium	Math
1859	Sorting the Sentence	Solution		Easy	String, Sort
1854	Maximum Population Year	Solution		Easy	Array
1848	Minimum Distance to the Target Element	Solution		Easy	Array
1845	Seat Reservation Manager	Solution		Medium	Heap, Design
1844	Replace All Digits with Characters	Solution		Easy	String
1837	Sum of Digits in Base K	Solution		Easy	Math, Bit Manipulation
1836	Remove Duplicates From an Unsorted Linked List	Solution		Medium	HashTable, LinkedList
1833	Maximum Ice Cream Bars	Solution		Medium	Array, Sort
1832	Check if the Sentence Is Pangram	Solution		Easy	String
1829	Maximum XOR for Each Query	Solution		Medium	Bit Manipulation
1828	Queries on Number of Points Inside a Circle	Solution	📺	Medium	Math
1827	Minimum Operations to Make the Array Increasing	Solution		Easy	Array, Greedy
1826	Faulty Sensor	Solution		Easy	Array, Two Pointers
1823	Find the Winner of the Circular Game	Solution		Medium	Array
1822	Sign of the Product of an Array	Solution		Easy	Math
1817	Finding the Users Active Minutes	Solution		Medium	HashTable
1816	Truncate Sentence	Solution		Easy	String
1814	Count Nice Pairs in an Array	Solution		Medium	Array, HashTable
1813	Sentence Similarity III	Solution	📺	Medium	String
1812	Determine Color of a Chessboard Square	Solution		Easy	String
1807	Evaluate the Bracket Pairs of a String	Solution		Medium	HashTable, String
1806	Minimum Number of Operations to Reinitialize a Permutation	Solution		Medium	Array, Greedy
1805	Number of Different Integers in a String	Solution		Medium	String
1804	Implement Trie II (Prefix Tree)	Solution		Medium	Trie, Design
1800	Maximum Ascending Subarray Sum	Solution		Easy	Two Pointers
1797	Design Authentication Manager	Solution		Medium	HashTable, Design
1796	Second Largest Digit in a String	Solution		Easy	String
1792	Maximum Average Pass Ratio	Solution		Medium	Heap
1791	Find Center of Star Graph	Solution		Medium	Graph
1790	Check if One String Swap Can Make Strings Equal	Solution		Easy	String
1785	Minimum Elements to Add to Form a Given Sum	Solution		Medium	Greedy
1784	Check if Binary String Has at Most One Segment of Ones	Solution		Easy	Greedy
1781	Sum of Beauty of All Substrings	Solution		Medium	HashTable, String
1780	Check if Number is a Sum of Powers of Three	Solution		Medium	Math, Backtracking, Recursion
1779	Find Nearest Point That Has the Same X or Y Coordinate	Solution		Easy	Array
1775	Equal Sum Arrays With Minimum Number of Operations	Solution		Medium	Greedy
1774	Closest Dessert Cost	Solution		Medium	Greedy
1773	Count Items Matching a Rule	Solution	📺	Easy	Array, String
1772	Sort Features by Popularity	Solution	📺	Medium	HashTable, Sort
1769	Minimum Number of Operations to Move All Balls to Each Box	Solution		Medium	Array, Greedy
1768	Merge Strings Alternately	Solution		Easy	String
1765	Map of Highest Peak	Solution		Medium	BFS, Graph
1764	Form Array by Concatenating Subarrays of Another Array	Solution		Medium	Array, Greedy
1763	Longest Nice Substring	Solution		Easy	String
1762	Buildings With an Ocean View	Solution		Medium
1759	Count Number of Homogenous Substrings	Solution		Medium	String ,Greedy
1758	Minimum Changes To Make Alternating Binary String	Solution		Easy	Greedy, Array
1756	Design Most Recently Used Queue	Solution		Medium	Array, Design, Dequeue
1754	Largest Merge Of Two Strings	Solution		Medium	Greedy, Suffix Array
1753	Maximum Score From Removing Stones	Solution		Medium	Math, Heap
1752	Check if Array Is Sorted and Rotated	Solution		Easy	Array
1750	Minimum Length of String After Deleting Similar Ends	Solution		Medium	Two Pointers
1749	Maximum Absolute Sum of Any Subarray	Solution		Medium	Greedy
1748	Sum of Unique Elements	Solution		Easy	Array, HashTable
1746	Maximum Subarray Sum After One Operation	Solution		Medium	DP
1745	Palindrome Partitioning IV	Solution		Hard	String, DP
1743	Restore the Array From Adjacent Pairs	Solution		Medium	Greedy
1742	Maximum Number of Balls in a Box	Solution		Easy	Array
1740	Find Distance in a Binary Tree	Solution		Medium	DFS, BFS
1736	Latest Time by Replacing Hidden Digits	Solution		Easy	String, Greedy
1733	Minimum Number of People to Teach	Solution		Medium	Array, Greedy
1732	Find the Highest Altitude	Solution		Easy	Array
1730	Shortest Path to Get Food	Solution		Medium	BFS
1727	Largest Submatrix With Rearrangements	Solution		Medium	Greedy, Sort
1726	Tuple with Same Product	Solution	📺	Medium	Array
1725	Number Of Rectangles That Can Form The Largest Square	Solution		Easy	Greedy
1721	Swapping Nodes in a Linked List	Solution		Medium	LinkedList
1720	Decode XORed Array	Solution		Easy	Bit Manipulation
1718	Construct the Lexicographically Largest Valid Sequence	Solution		Medium	Backtracking, Recursion
1717	Maximum Score From Removing Substrings	Solution	📺	Medium	Greedy
1716	Calculate Money in Leetcode Bank	Solution		Easy	Math, Greedy
1711	Count Good Meals	Solution		Medium	Array, HashTable, Two Pointers
1710	Maximum Units on a Truck	Solution		Easy	Greedy, Sort
1708	Largest Subarray Length K	Solution		Easy	Array, Greedy
1705	Maximum Number of Eaten Apples	Solution		Medium	Heap, Greedy
1704	Determine if String Halves Are Alike	Solution		Easy	String
1701	Average Waiting Time	Solution		Medium	Array
1700	Number of Students Unable to Eat Lunch	Solution		Easy	Array
1695	Maximum Erasure Value	Solution		Medium	Two Pointers
1694	Reformat Phone Number	Solution		Easy	String
1690	Stone Game VII	Solution		Medium	DP
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Solution		Medium	Greedy
1688	Count of Matches in Tournament	Solution		Easy	Backtracking
1686	Stone Game VI	Solution		Medium	Greedy
1685	Sum of Absolute Differences in a Sorted Array	Solution	📺	Medium	Math, Greedy
1684	Count the Number of Consistent Strings	Solution		Easy	String
1680	Concatenation of Consecutive Binary Numbers	Solution		Medium	Math
1679	Max Number of K-Sum Pairs	Solution		Medium	HashTable
1678	Goal Parser Interpretation	Solution		Easy	String
1676	Lowest Common Ancestor of a Binary Tree IV	Solution		Medium	Tree, DFS, Binary Tree
1675	Minimize Deviation in Array	Solution		Hard	Heap, Ordered Map
1673	Find the Most Competitive Subsequence	Solution	📺	Medium	Stack, Greedy
1672	Richest Customer Wealth	Solution		Easy	Array
1670	Design Front Middle Back Queue	Solution		Medium	Linked List, Design, Dequeu
1669	Merge In Between Linked Lists	Solution		Medium	LinedList
1668	Maximum Repeating Substring	Solution		Easy	String
1664	Ways to Make a Fair Array	Javascript		Medium	Greedy
1663	Smallest String With A Given Numeric Value	Solution	📺	Medium	Greedy
1662	Check If Two String Arrays are Equivalent	Solution		Easy	String
1660	Correct a Binary Tree	Javascript, Java		Medium	BFS, Tree
1658	Minimum Operations to Reduce X to Zero	Javascript, Java		Medium	Greedy
1657	Determine if Two Strings Are Close	Solution	📺	Medium	Greedy
1656	Design an Ordered Stream	Solution		Easy	Array, Design
1653	Minimum Deletions to Make String Balanced	Solution		Medium	Array, DP, Stack
1652	Defuse the Bomb	Solution		Easy	Array
1650	Lowest Common Ancestor of a Binary Tree III	Solution		Medium	HashTable, Binary Tree, Tree
1646	Get Maximum in Generated Array	Solution		Easy	Array
1644	Lowest Common Ancestor of a Binary Tree II	Solution		Medium	Binary Tree, DFS
1642	Furthest Building You Can Reach	Solution		Medium	Binary Search, Heap
1641	Count Sorted Vowel Strings	Solution	📺	Medium	Math, DP, Backtracking
1640	Check Array Formation Through Concatenation	Solution		Easy	Array, Sort
1637	Widest Vertical Area Between Two Points Containing No Points	Javascript, Java		Medium	Sort
1636	Sort Array by Increasing Frequency	Solution		Easy	Array, Sort
1630	Arithmetic Subarrays	Solution		Medium	Sort
1629	Slowest Key	Solution		Easy	Array
1628	Design an Expression Tree With Evaluate Function	Solution		Medium	Stack, Binary Tree, Design, Math
1626	Best Team With No Conflicts	Solution		Medium	DP
1625	Lexicographically Smallest String After Applying Operations	Solution		Medium	BFS, DFS
1624	Largest Substring Between Two Equal Characters	Solution	📺	Easy	String
1620	Coordinate With Maximum Network Quality	Solution	📺	Medium	Greedy
1619	Mean of Array After Removing Some Elements	Solution	📺	Easy	Array
1614	Maximum Nesting Depth of the Parentheses	Solution		Easy	String
1609	Even Odd Tree	Solution		Medium	Tree
1608	Special Array With X Elements Greater Than or Equal X	Solution		Easy	Array
1605	Find Valid Matrix Given Row and Column Sums	Solution		Medium	Greedy, Array, Matrix
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	Solution		Medium	String, Ordered Map
1603	Design Parking System	Solution		Easy	Design
1602	Find Nearest Right Node in Binary Tree	Solution		Medium	Tree, BFS
1601	Maximum Number of Achievable Transfer Requests	Solution		Hard	Backtracking
1600	Throne Inheritance	Solution		Medium	Tree, Design, DFS, HashMap
1598	Crawler Log Folder	Solution		Easy	Stack
1592	Rearrange Spaces Between Words	Solution		Easy	String
1588	Sum of All Odd Length Subarrays	Solution		Easy	Array
1583	Count Unhappy Friends	Solution		Medium	Array
1582	Special Positions in a Binary Matrix	Solution		Easy	Array
1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Solution		Medium	HashTable, Math
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	Solution	📺	Easy	String
1574	Shortest Subarray to be Removed to Make Array Sorted	Solution		Medium	Array, Binary Search
1572	Matrix Diagonal Sum	Solution		Easy	Array
1570	Dot Product of Two Sparse Vectors	Solution		Easy	Array, HashTable, Two Pointers
1567	Maximum Length of Subarray With Positive Product	Solution	📺	Medium	Greedy
1566	Detect Pattern of Length M Repeated K or More Times	Solution	📺	Easy	Array
1561	Maximum Number of Coins You Can Get	Solution	📺	Medium	Sort
1560	Most Visited Sector in a Circular Track	Solution		Easy	Array
1558	Minimum Numbers of Function Calls to Make Target Array	Solution		Medium	Greedy
1557	Minimum Number of Vertices to Reach All Nodes	Solution	📺	Medium	Graph
1556	Thousand Separator	Solution	📺	Easy	String
1551	Minimum Operations to Make Array Equal	Solution	📺	Medium	Math
1550	Three Consecutive Odds	Solution		Easy	Array
1545	Find Kth Bit in Nth Binary String	Solution	📺	Medium	String
1544	Make The String Great	Solution	📺	Easy	String, Stack
1541	Minimum Insertions to Balance a Parentheses String	Solution	📺	Medium	String, Stack
1539	Kth Missing Positive Number	Solution	📺	Easy	Array, HashTable
1535	Find the Winner of an Array Game	Solution	📺	Medium	Array
1534	Count Good Triplets	Solution		Easy	Array
1530	Number of Good Leaf Nodes Pairs	Solution		Medium	Tree, DFS
1528	Shuffle String	Solution		Easy	Sort
1526	Minimum Number of Increments on Subarrays to Form a Target Array	Solution		Hard	Segment Tree
1525	Number of Good Ways to Split a String	Solution	📺	Medium	String, Bit Manipulation
1524	Number of Sub-arrays With Odd Sum	Solution		Medium	Array, Math
1523	Count Odd Numbers in an Interval Range	Solution	📺	Easy	Math
1518	Water Bottles	Solution		Easy	Greedy
1514	Path with Maximum Probability	Solution		Medium	Graph
1512	Number of Good Pairs	Solution		Easy	Array, HashTable, Math
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	Solution		Medium	Array, Sort, Greedy
1508	Range Sum of Sorted Subarray Sums	Solution		Medium	Array, Sort
1507	Reformat Date	Solution		Easy	String
1502	Can Make Arithmetic Progression From Sequence	Solution		Easy	Array, Sort
1496	Path Crossing	Solution		Easy	String
1493	Longest Subarray of 1's After Deleting One Element	Solution	📺	Medium	Array
1492	The kth Factor of n	Solution		Medium	Math
1491	Average Salary Excluding the Minimum and Maximum Salary	Solution		Easy	Array, Sort
1490	Clone N-ary Tree	Solution	📺	Medium	HashTable, Tree, DFS, BFS
1487	Making File Names Unique	Solution		Medium	HashTable, String
1486	XOR Operation in an Array	Solution		Medium	Array, Bit Manipulation
1485	Clone Binary Tree With Random Pointer	Solution		Medium	HashTable, Tree, DFS, BFS
1482	Minimum Number of Days to Make m Bouquets	Solution		Medium	Array, Binary Search
1481	Least Number of Unique Integers after K Removals	Solution		Medium	Array, Sort
1480	Running Sum of 1d Array	Solution, C++		Easy	Array
1476	Subrectangle Queries	Solution		Medium	Array
1475	Final Prices With a Special Discount in a Shop	Solution		Easy	Array
1474	Delete N Nodes After M Nodes of a Linked List	Solution		Easy	LinkedList
1472	Design Browser History	Solution		Medium	Array, Design
1471	The k Strongest Values in an Array	Solution		Medium	Array, Sort
1470	Shuffle the Array	Solution, C++		Easy	Array
1469	Find All The Lonely Nodes	Solution		Easy	Tree, DFS
1466	Reorder Routes to Make All Paths Lead to the City Zero	Solution		Medium	Tree, DFS, BFS
1464	Maximum Product of Two Elements in an Array	Solution		Easy	Array
1462	Course Schedule IV	Solution		Medium	Topological Sort, DFS, BFS
1461	Check If a String Contains All Binary Codes of Size K	Solution		Medium	String, Bit Manipulation
1460	Make Two Arrays Equal by Reversing Sub-arrays	Solution		Easy	Array
1457	Pseudo-Palindromic Paths in a Binary Tree	Solution		Medium	Bit Manipulation, Tree, DFS
1456	Maximum Number of Vowels in a Substring of Given Length	Solution		Medium	String, Sliding Window
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	Solution		Easy	String
1452	People Whose List of Favorite Companies Is Not a Subset of Another List	Solution		Medium	String, Sort
1451	Rearrange Words in a Sentence	Solution		Medium	String, Sort
1450	Number of Students Doing Homework at a Given Time	Solution		Easy	Array
1448	Count Good Nodes in Binary Tree	Solution		Medium	Tree, DFS
1447	Simplified Fractions	Solution		Medium	Math
1446	Consecutive Characters	Solution		Easy	String
1441	Build an Array With Stack Operations	Solution		Easy	Stack
1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	Solution		Hard	Array, Binary Search, PriorityQueue, Matrix
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Solution		Medium	Array, Queue, Sliding Window, PriorityQueue, Monotonic Queue
1437	Check If All 1's Are at Least Length K Places Away	Solution		Medium	Array
1436	Destination City	Solution		Easy	String
1432	Max Difference You Can Get From Changing an Integer	Solution		Medium	String
1431	Kids With the Greatest Number of Candies	Solution, C++		Easy	Array
1429	First Unique Number	Solution		Medium	Array, HashTable, Design, Data Streams
1428	Leftmost Column with at Least a One	Solution		Medium	Array
1427	Perform String Shifts	Solution		Easy	Array, Math
1426	Counting Elements	Solution		Easy	Array
1424	Diagonal Traverse II	Solution		Medium	Matrix
1423	Maximum Points You Can Obtain from Cards	Solution		Medium	Array, DP, Sliding Window
1422	Maximum Score After Splitting a String	Solution		Easy	String
1418	Display Table of Food Orders in a Restaurant	Solution		Medium	HashTable
1417	Reformat The String	Solution		Easy	String
1415	The k-th Lexicographical String of All Happy Strings of Length n	Solution		Medium	Backtracking
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Solution		Medium	Array, Greedy
1413	Minimum Value to Get Positive Step by Step Sum	Solution		Easy	Array
1410	HTML Entity Parser	Solution		Medium	String, Stack
1409	Queries on a Permutation With Key	Solution		Medium	Array
1408	String Matching in an Array	Solution		Easy	String
1405	Longest Happy String	Solution		Medium	PriorityQueue, Greedy
1403	Minimum Subsequence in Non-Increasing Order	Solution		Easy	Greedy, Sort
1402	Reducing Dishes	Solution		Hard	Dynamic Programming
1401	Circle and Rectangle Overlapping	Solution		Medium	Geometry
1400	Construct K Palindrome Strings	Solution		Medium	Greedy
1399	Count Largest Group	Solution		Easy	Array
1396	Design Underground System	Solution		Medium	Design
1395	Count Number of Teams	Solution		Medium	Array
1394	Find Lucky Integer in an Array	Solution		Easy	Array
1392	Longest Happy Prefix	Solution		Hard	String, Rolling Hash
1390	Four Divisors	Solution		Medium	Math
1389	Create Target Array in the Given Order	Solution		Easy	Array
1388	Pizza With 3n Slices	Solution		Hard	DP
1387	Sort Integers by The Power Value	Solution		Medium	Sort, Graph
1386	Cinema Seat Allocation	Solution		Medium	Array, Greedy
1385	Find the Distance Value Between Two Arrays	Solution		Easy	Array
1382	Balance a Binary Search Tree	Solution		Medium	Binary Search Tree
1381	Design a Stack With Increment Operation	Solution		Medium	Stack, Design
1380	Lucky Numbers in a Matrix	Solution		Easy	Array
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Solution		Medium	Tree
1377	Frog Position After T Seconds	Solution		Hard	DFS, BFS
1376	Time Needed to Inform All Employees	Solution		Medium	DFS
1375	Bulb Switcher III	Solution		Medium	Array
1374	Generate a String With Characters That Have Odd Counts	Solution		Easy	String
1373	Maximum Sum BST in Binary Tree	Solution		Hard	DP, BST
1372	Longest ZigZag Path in a Binary Tree	Solution		Hard	DP, Tree
1371	Find the Longest Substring Containing Vowels in Even Counts	Solution		Medium	String
1370	Increasing Decreasing String	Solution		Easy	String, Sort
1367	Linked List in Binary Tree	Solution		Medium	DP, Linked List, Tree
1366	Rank Teams by Votes	Solution		Medium	Array, Sort
1365	How Many Numbers Are Smaller Than the Current Number	Solution		Easy	Array, HashTable
1362	Closest Divisors	Solution		Medium	Math
1361	Validate Binary Tree Nodes	Solution		Medium	Graph
1360	Number of Days Between Two Dates	Solution		Easy
1358	Number of Substrings Containing All Three Characters	Solution		Medium	String
1357	Apply Discount Every n Orders	Solution		Medium	Design
1356	Sort Integers by The Number of 1 Bits	Solution		Easy	Sort, Bit Manipulation
1354	Construct Target Array With Multiple Sums	Solution		Hard	Greedy
1353	Maximum Number of Events That Can Be Attended	Solution		Medium	Greedy, Sort, Segment Tree
1352	Product of the Last K Numbers	Solution		Medium	Array, Design
1351	Count Negative Numbers in a Sorted Matrix	Solution		Easy	Array, Binary Search
1349	Maximum Students Taking Exam	Solution		Hard	Dynamic Programming
1348	Tweet Counts Per Frequency	Solution		Medium	Design
1347	Minimum Number of Steps to Make Two Strings Anagram	Solution		Easy	String
1346	Check If N and Its Double Exist	Solution		Easy	Array
1345	Jump Game IV	Solution		Hard	BFS
1344	Angle Between Hands of a Clock	Solution		Medium	Math
1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Solution		Medium	Array
1342	Number of Steps to Reduce a Number to Zero	Solution		Easy	Bit Manipulation
1341	The K Weakest Rows in a Matrix	Solution		Easy
1339	Maximum Product of Splitted Binary Tree	Solution		Medium	DFS, Tree
1338	Reduce Array Size to The Half	Solution		Medium
1337	Remove Palindromic Subsequences	Solution		Easy	String
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	Solution		Medium	Dijkstra's algorithm, Graph
1333	Filter Restaurants by Vegan-Friendly, Price and Distance	Solution		Medium
1332	Remove Palindromic Subsequences	Solution		Easy	String
1331	Rank Transform of an Array	Solution		Easy
1329	Sort the Matrix Diagonally	Solution		Medium
1325	Delete Leaves With a Given Value	Solution		Medium	Tree
1324	Print Words Vertically	Solution		Medium	String
1323	Maximum 69 Number	Solution		Easy	Math
1317	Convert Integer to the Sum of Two No-Zero Integers	Solution		Easy
1315	Sum of Nodes with Even-Valued Grandparent	Solution		Medium	Tree, DFS
1314	Matrix Block Sum	Solution		Medium	Prefix Sum
1313	Decompress Run-Length Encoded List	Solution		Easy	Array
1305	All Elements in Two Binary Search Trees	Solution		Medium
1304	Find N Unique Integers Sum up to Zero	Solution		Easy
1302	Deepest Leaves Sum	Solution		Medium
1300	Sum of Mutated Array Closest to Target	Solution		Medium	Binary Search, Sorting
1299	Replace Elements with Greatest Element on Right Side	Solution		Easy
1297	Maximum Number of Occurrences of a Substring	Solution		Medium
1296	Divide Array in Sets of K Consecutive Numbers	Solution		Medium
1295	Find Numbers with Even Number of Digits	Java Javascript	📺	Easy
1291	Sequential Digits	Solution		Medium
1290	Convert Binary Number in a Linked List to Integer	Solution		Easy
1289	Minimum Falling Path Sum II	Solution		Hard	Dynamic Programming
1287	Element Appearing More Than 25% In Sorted Array	Solution	📺	Easy
1286	Iterator for Combination	Solution		Medium	Backtracking, Design
1283	Find the Smallest Divisor Given a Threshold	Solution	Medium
1282	Group the People Given the Group Size They Belong To	Solution	📺	Medium
1281	Subtract the Product and Sum of Digits of an Integer	Solution		Easy
1277	Count Square Submatrices with All Ones	Solution		Medium
1275	Find Winner on a Tic Tac Toe Game	Solution		Easy	Array
1273	Delete Tree Nodes	Solution		Medium	Dynamic Programming, DFS
1271	Hexspeak	Solution		Easy
1268	Search Suggestions System	Solution	📺	Medium	String
1267	Count Servers that Communicate	Solution		Medium
1266	Minimum Time Visiting All Points	Solution		Easy
1265	Print Immutable Linked List in Reverse	Solution		Medium
1261	Find Elements in a Contaminated Binary Tree	Solution		Medium	Tree, HashTable
1260	Shift 2D Grid	Solution	📺	Easy
1258	Synonymous Sentences	Solution		Medium	Backtracking
1257	Smallest Common Region	Solution		Medium	Tree, HashTable, DFS, BFS
1254	Number of Closed Islands	Solution		Medium	BFS
1252	Cells with Odd Values in a Matrix	Solution		Easy
1249	Minimum Remove to Make Valid Parentheses	Solution		Medium	String, Stack
1243	Array Transformation	Solution	📺	Easy
1242	Web Crawler Multithreaded	Solution		Medium	Concurrency
1237	Find Positive Integer Solution for a Given Equation	Solution		Easy
1233	Remove Sub-Folders from the Filesystem	Solution		Easy
1232	Check If It Is a Straight Line	Solution	📺	Easy
1230	Toss Strange Coins	Solution		Medium	DP
1228	Missing Number In Arithmetic Progression	Solution		Easy
1221	Split a String in Balanced Strings	Solution		Easy	Greedy
1219	Path with Maximum Gold	Solution		Medium	Backtracking
1217	Play with Chips	Solution		Easy	Array, Math, Greedy
1214	Two Sum BSTs	Solution		Medium	Binary Search Tree
1213	Intersection of Three Sorted Arrays	Solution	📺	Easy
1209	Remove All Adjacent Duplicates in String II	Solution		Medium	Stack
1207	Unique Number of Occurrences	Solution	📺	Easy
1200	Minimum Absolute Difference	Solution	📺	Easy
1198	Find Smallest Common Element in All Rows	Solution	📺	Easy
1197	Minimum Knight Moves	Solution		Medium	BFS
1196	How Many Apples Can You Put into the Basket	Solution	📺	Easy
1190	Reverse Substrings Between Each Pair of Parentheses	Solution		Medium	Stack
1189	Maximum Number of Balloons	Solution	📺	Easy
1185	Day of the Week	Solution		Easy
1184	Distance Between Bus Stops	Solution	📺	Easy
1182	Shortest Distance to Target Color	Solution		Medium	Binary Search
1180	Count Substrings with Only One Distinct Letter	Solution		Easy	Math, String
1176	Diet Plan Performance	Solution		Easy	Array, Sliding Window
1175	Prime Arrangements	Solution		Easy	Math
1171	Remove Zero Sum Consecutive Nodes from Linked List	Solution		Medium	LinkedList
1165	Single-Row Keyboard	Solution		Easy
1161	Maximum Level Sum of a Binary Tree	Solution		Medium	Graph
1160	Find Words That Can Be Formed by Characters	Solution		Easy
1154	Day of the Year	Solution		Easy
1152	Analyze User Website Visit Pattern	Solution	📺	Medium	HashTable, Sort, Array
1151	Minimum Swaps to Group All 1's Together	Solution		Medium	Array, Sliding Window
1150	Check If a Number Is Majority Element in a Sorted Array	Solution	📺	Easy
1146	Snapshot Array	Javascript Java		Medium
1143	Longest Common Subsequence	Solution		Medium	String, DP
1138	Alphabet Board Path	Solution	📺	Medium	HashTable, String
1137	N-th Tribonacci Number	Solution		Easy
1136	Parallel Courses	Solution		Medium	Topological Sort
1134	Armstrong Number	Solution	📺	Easy
1133	Largest Unique Number	Solution	📺	Easy
1128	Number of Equivalent Domino Pairs	Solution	📺	Easy
1122	Relative Sort Array	Solution		Easy
1170	Compare Strings by Frequency of the Smallest Character	Solution		Easy
1120	Maximum Average Subtree	Solution		Medium	Tree, DFS
1119	Remove Vowels from a String	Solution	📺	Easy
1118	Number of Days in a Month	Solution		Easy
1114	Print in Order	Solution		Easy
1110	Delete Nodes And Return Forest	Solution		Medium	Tree, DFS, BFS
1108	Defanging an IP Address	Solution	📺	Easy
1105	Filling Bookcase Shelves	Solution		Medium	DP
1104	Path In Zigzag Labelled Binary Tree	Solution		Medium	Math, Tree
1103	Distribute Candies to People	Solution		Easy	Math
1100	Find K-Length Substrings With No Repeated Characters	Solution		Medium	String, Sliding Window
1099	Two Sum Less Than K	Solution	📺	Easy
1094	Car Pooling	Solution		Medium	Array, Sorting, Heap, Simulation, Prefix Sum
1090	Largest Values From Labels	Solution	📺	Medium	HashTable, Greedy
1091	Shortest Path in Binary Matrix	Solution		Medium	BFS
1089	Duplicate Zeros	Solution		Easy
1087	Brace Expansion	Solution		Medium	Backtracking
1086	High Five	Solution	📺	Easy
1085	Sum of Digits in the Minimum Number	Solution	📺	Easy
1080	Insufficient Nodes in Root to Leaf Paths	Solution		Medium	Tree, DFS
1079	Letter Tile Possibilities	Solution		Medium
1078	Occurrences After Bigram	Solution		Easy
1071	Greatest Common Divisor of Strings	Solution		Easy
1066	Campus Bikes II	Solution		Medium	Backtracking, DP
1065	Index Pairs of a String	Solution		Medium
1062	Longest Repeating Substring	Solution		Medium	String, Binary Search, DP, Rolling Hash, Suffix Array, Hash Function
1061	Lexicographically Smallest Equivalent String	Solution	📺	Medium	Union Find
1060	Missing Element in Sorted Array	Solution		Medium
1059	All Paths from Source Lead to Destination	Solution		Medium	DFS
1057	Campus Bikes	Solution		Medium
1056	Confusing Number	Solution		Easy
1055	Fixed Point	Solution		Easy
1051	Height Checker	Solution		Easy
1047	Remove All Adjacent Duplicates In String	Solution		Easy
1046	Last Stone Weight	Solution	📺	Easy
1043	Partition Array for Maximum Sum	Solution		Medium	DP
1038	Binary Search Tree to Greater Sum Tree	Solution		Medium	DFS, tree
1037	Valid Boomerang	Solution		Easy	Math
1034	Coloring A Border	Solution		Medium	DFS
1033	Moving Stones Until Consecutive	Solution		Easy	Math
1030	Matrix Cells in Distance Order	Solution		Easy
1029	Two City Scheduling	Solution		Easy
1026	Maximum Difference Between Node and Ancestor	Solution		Medium	Tree, DFS, Binary Tree
1025	Divisor Game	Solution		Easy	Math, DP, Brainteaser, Game Theory
1024	Video Stitching	Solution		Medium	Array, DP, Greedy
1022	Sum of Root To Leaf Binary Numbers	Solution		Easy
1021	Remove Outermost Parentheses	Solution		Easy
1020	Number of Enclaves	Solution		Medium	Graph, DFS, BFS, recursion
1019	Next Greater Node In Linked List	Solution		Medium	Linked List, Stack
1018	Binary Prefix Divisible By 5	Solution		Easy
1014	Best Sightseeing Pair	Solution		Medium
1013	Partition Array Into Three Parts With Equal Sum	Solution		Easy
1011	Capacity To Ship Packages Within D Days	Solution		Medium	Binary Search
1010	Pairs of Songs With Total Durations Divisible by 60	Solution		Easy
1009	Complement of Base 10 Integer	Solution		Easy
1008	Construct Binary Search Tree from Preorder Traversal	Solution		Medium	Recursion
1005	Maximize Sum Of Array After K Negations	Solution	📺	Easy
1004	Max Consecutive Ones III	Solution	📺	Medium	Two Pointers, Sliding Window
1003	Check If Word Is Valid After Substitutions	Solution		Medium
1002	Find Common Characters	Solution		Easy

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