Evaluate Division题解 原创文章,拒绝转载 题目来源:https://leetcode.com/problems/evaluate-division/description/ Description Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number…

lc 399 Evaluate Division 399 Evaluate Division Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does…

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 日期 题目地址:https://leetcode.com/problems/delete-and-earn/description/ 题目描述 Equations are given in the format A / B = k, where A and B are variables represented as strings, and k i…

Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does not exist, return -1.0. Example:Given a / b =…

Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does not exist, return -1.0. Example:Given a / b =…

Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does not exist, return -1.0. Example: Given a / b =…

我是链接 看到这道题,2个点和一个权值,然后想到图,但是leetcode就是这样,没给数据范围,感觉写起来很费劲,然后就开始用图来做,添加边的时候,注意正向边和反向变,然后查询的时候,先判断2个点是否都出现,然后判断是不是自己到自己,最后用dfs或者bfs到图里面去搜索,第一次交的时候,忘记用vis标记访问过的点,导致tle,加上之后,就ac了,套路一般吧,不知道还有什么trick. double dfs(vector<vector<pair<int, double> > &…

题目如下: Equations are given in the format A / B = k, whereA and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does not exist, return -1.0. Example:Given a /…

Web前端性能优化WPO,相信大多数前端同学都不会陌生,在各自所负责的站点页面中,也都会或多或少的有过一定的技术实践.可以说,这个领域并不缺乏成熟技术理论和技术牛人:例如Yahoo的web站点性能优化黄金法则,以及大名鼎鼎的优化大师Steve Souders.本文并非一篇讨论性能优化技术方法的文章,而更多的是对中文站搜索List页面持续两年多的前端性能优化实践的思路总结.希望对正在从事这个领域研究的前端同学能有所帮助. 简单的说,我们的性能优化实践分为三个阶段:初探期.立规期.创新期, 每个阶段…

Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given some queries, return the answers. If the answer does not exist, return -1.0. Example:Given a / b =…