这题明明是一个简单的类似约瑟夫环的问题,但是由于细节问题迟迟不能得到正确结果,结果比赛完几分钟才改对..耻辱. 代码: #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #define ll long long using namespace std; #define NN 370000 class Choo…
周赛时遇到的一道比较有意思的题目: Problem Statement There are N rooms in Maki's new house. The rooms are numbered from 0 to N-1. Some pairs of rooms are connected by bidirectional passages. The passages have the topology of a tree. That is, there are exactly N-…
题目比较简单. 注意看测试用例2,给的提示 Please note that this is the largest possible return value: whenever there is a solution, there is a solution that uses at most two moves. 最多只有两步 #include <vector> #include <string> #include <list> #include <map&…