_0240

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Published: Feb 20, 2024 License: MIT Imports: 1 Imported by: 0

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搜索二维矩阵 II

编写一个高效的算法来搜索 m x n 矩阵 matrix 中的一个目标值 target 。该矩阵具有以下特性:

  • 每行的元素从左到右升序排列。
  • 每列的元素从上到下升序排列。

示例 1:

``` 输入: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 输出:true


**示例 2:**

![](https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2020/11/25/searchgrid.jpg)```
输入: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
输出:false

提示:

  • m == matrix.length
  • n == matrix[i].length
  • 1 <= n, m <= 300
  • -109 <= matrix[i][j] <= 109
  • 每行的所有元素从左到右升序排列
  • 每列的所有元素从上到下升序排列
  • -109 <= target <= 109

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