摘要: #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; const ld eps = 1e-8; const int N = 50009; const ld pi = aco 阅读全文
posted @ 2021-10-19 10:24 u_yan 阅读(24) 评论(0) 推荐(0) 编辑