weixin_45113721的博客

#include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <vector> #include <string> #include <map> #include <set> #include <cassert> using namespace std; #define rep(i,a,n) fo

代码：https://blog.youkuaiyun.com/qq_45458915/article/details/106040237