摘要: #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; const int N = 9000000; const ld pi = acos(-1); struct CP { 阅读全文
posted @ 2021-07-28 12:44 u_yan 阅读(30) 评论(0) 推荐(0) 编辑