摘要: #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; const ll inf = 0x3f3f3f3f; const ll N = 5e5 + 9; struct edg 阅读全文
posted @ 2021-10-29 21:37 u_yan 阅读(40) 评论(0) 推荐(0) 编辑