原文:Codeforces Round #591 (Div. 2, based on Technocup 2020 Elimination Round 1) C. Save the Nature

链接: https: codeforces.com contest problem C 题意: You are an environmental activist at heart but the reality is harsh and you are just a cashier in a cinema. But you can still do something You have n ti ...

2019-10-07 13:29 0 385 推荐指数:

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Codeforces Round #728 (Div. 2) C. Great Graphs

Great Graphs 题意 给你一个数组\(d\),\(d[i]\)表示从节点\(1\)到其他各个节点的最短路的长度,然后你可以对这个图进行加边(可以是负边),但不允许存在一个权值和为负数的回 ...

Mon Jun 28 23:09:00 CST 2021 0 187
 
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