Class Solution

java.lang.Object
g0201_0300.s0240_search_a_2d_matrix_ii.Solution

public class Solution extends Object
240 - Search a 2D Matrix II\. Medium Write an efficient algorithm that searches for a `target` value in an `m x n` integer `matrix`. The `matrix` has the following properties: * Integers in each row are sorted in ascending from left to right. * Integers in each column are sorted in ascending from top to bottom. **Example 1:** ![](https://assets.leetcode.com/uploads/2020/11/24/searchgrid2.jpg) **Input:** matrix = \[\[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 5 **Output:** true **Example 2:** ![](https://assets.leetcode.com/uploads/2020/11/24/searchgrid.jpg) **Input:** matrix = \[\[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 20 **Output:** false **Constraints:** * `m == matrix.length` * `n == matrix[i].length` * `1 <= n, m <= 300` * -109 <= matrix[i][j] <= 109 * All the integers in each row are **sorted** in ascending order. * All the integers in each column are **sorted** in ascending order. * -109 <= target <= 109
  • Constructor Details

    • Solution

      public Solution()
  • Method Details

    • searchMatrix

      public boolean searchMatrix(int[][] matrix, int target)