Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row ...
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted in ascending from left to right. Integers in each ...
2015-07-23 00:58 3 15088 推荐指数:
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row ...
题目描述 编写一个高效的算法来判断 m x n 矩阵中,是否存在一个目标值。该矩阵具有如下特性: 每行中的整数从左到右按升序排列。 每行的第一个整数大于前一行的最后一个整数。 示例 1: 示例 2: 解题思路 用二分查找 ...
题目要求 Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each ...
这道题是让我们在二维数组中快速搜索一个数字,这个二维数组各行各列都是按递增顺序排列的,观察题目中给的例子,我们可以发现有两个位置的数字很有特点,左下角和右上角的数,左下角的18,往上所有数变小,往右所有数变大。那么我们就可以和目标数相比较,如果目标数打,就往右搜,如果目标数小,就往上搜 ...
很巧妙的思路,可以从左下或者右上开始找 这道题的一个优化是对于一个矩阵的最后一行做二分搜索后,删掉前几列和最后一行,得到一个子矩阵。重复这样的操作,时间复杂度是O(min(m,n)log(max(m,n)))。之后跟她提了一下这个方法在m和n相差比较 ...
题目: Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row ...
原题地址:https://oj.leetcode.com/problems/search-a-2d-matrix/ 题意: Write an efficient algorithm that searches for a value ...
Given a positive integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. Example: 此题跟之前那道 ...