LeetCode "473. Matchsticks to Square"】的更多相关文章

A trickier DFS, with a little bit complex recursion param tweak, and what's more important is pruning strategies.. or your code will TLE. class Solution { bool go(vector<bool> &m, int edge, int eleft, int etgt, vector<int> &in, int tak…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/matchsticks-to-square/description/ 题目描述 Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little…
题目如下: 解题思路:居然把卖火柴的小女孩都搬出来了.题目的意思是输入一个数组,判断能否把数组分成四个子数组,使得每个子数组的和相等.首先我们可以很容易的求出每个子数组的和应该是avg = sum(nums)/4,接下来我的思路是求出nums中所有和等于avg的子数组,子数组中保存元素下标,然后找出四个不存在相同下标的子数组求并集,如果并集长度刚好等于len(nums),那么就是符合条件的,返回true.如果在子数组列表中找到四个符合条件的子数组,我用的是DFS,为什么不用BFS?因为题目要求是…
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, a…
还记得童话<卖火柴的小女孩>吗?现在,你知道小女孩有多少根火柴,请找出一种能使用所有火柴拼成一个正方形的方法.不能折断火柴,可以把火柴连接起来,并且每根火柴都要用到.输入为小女孩拥有火柴的数目,每根火柴用其长度表示.输出即为是否能用所有的火柴拼成正方形.示例 1:输入: [1,1,2,2,2]输出: true解释: 能拼成一个边长为2的正方形,每边两根火柴. 示例 2:输入: [3,3,3,3,4]输出: false解释: 不能用所有火柴拼成一个正方形.注意:    给定的火柴长度和在 0 到…
Leetcode之深度优先搜索(DFS)专题-473. 火柴拼正方形(Matchsticks to Square) 深度优先搜索的解题详细介绍,点击 还记得童话<卖火柴的小女孩>吗?现在,你知道小女孩有多少根火柴,请找出一种能使用所有火柴拼成一个正方形的方法.不能折断火柴,可以把火柴连接起来,并且每根火柴都要用到. 输入为小女孩拥有火柴的数目,每根火柴用其长度表示.输出即为是否能用所有的火柴拼成正方形. 示例 1: 输入: [1,1,2,2,2] 输出: true 解释: 能拼成一个边长为2的…
LeetCode 题解 593. Valid Square (Medium) 判断给定的四个点,是否可以组成一个正方形 https://leetcode.com/problems/valid-square/solution/ bug "use strict"; /** * * @author xgqfrms * @license MIT * @copyright xgqfrms * @created 2020-11-11 * @modified * * @description 593…
[LeetCode]593. Valid Square 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/valid-square/description/ 题目描述: Given the coordinates of four points in 2D space, return whether the four points could…
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, a…
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, a…