src/main/java/com/fishercoder/solutions/_240.java

package com.fishercoder.solutions;

public class _240 {

    public static class Solution1 {
        public boolean searchMatrix(int[][] matrix, int target) {
            if (matrix == null || matrix.length == 0) {
                return false;
            }
            int m = matrix.length;
            int n = matrix[0].length;
            int x = 0;
            int y = n - 1;
            while (x < m && y >= 0) {
                if (target == matrix[x][y]) {
                    return true;
                } else if (target > matrix[x][y]) {
                    x++;
                } else {
                    y--;
                }
            }
            return false;
        }
    }

}