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 ...
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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 ...
題目描述 編寫一個高效的算法來判斷 m x n 矩陣中,是否存在一個目標值。該矩陣具有如下特性: 每行中的整數從左到右按升序排列。 每行的第一個整數大於前一行的最后一個整數。 示例 1: 示例 2: 解題思路 用二分查找 ...
題目要求 Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each ...
這道題是讓我們在二維數組中快速搜索一個數字,這個二維數組各行各列都是按遞增順序排列的,觀察題目中給的例子,我們可以發現有兩個位置的數字很有特點,左下角和右上角的數,左下角的18,往上所有數變小,往右所有數變大。那么我們就可以和目標數相比較,如果目標數打,就往右搜,如果目標數小,就往上搜 ...
很巧妙的思路,可以從左下或者右上開始找 這道題的一個優化是對於一個矩陣的最后一行做二分搜索后,刪掉前幾列和最后一行,得到一個子矩陣。重復這樣的操作,時間復雜度是O(min(m,n)log(max(m,n)))。之后跟她提了一下這個方法在m和n相差比較 ...
題目: 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 ...
原題地址:https://oj.leetcode.com/problems/search-a-2d-matrix/ 題意: 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: 此題跟之前那道 ...