goden1009

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Published: Aug 9, 2023 License: GPL-3.0 Imports: 0 Imported by: 0

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面试题 10.09.排序矩阵查找

1. 题目描述

给定MxN矩阵,每一行、每一列都按升序排列,请编写代码找出某元素。

示例:

现有矩阵 matrix 如下:

[
  [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]
]

给定 target = 5 ,返回 true

给定 target = 20 ,返回 false

标签 数组 二分查找 分治 矩阵

2. 解题

将矩阵看作一个二叉树,根节点为右上角节点。

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