摘要:
简单倍增 #include <bits/stdc++.h> using namespace std; using ll = long long; int main() { freopen("fountain.in","r",stdin); freopen("fountain.out","w",std 阅读全文
摘要:
直接连边,然后枚举删除哪一个边,判断环即可 点击查看代码 #include <bits/stdc++.h> using namespace std; constexpr int MAXN = 110; constexpr int MAXM = 4010; struct Edge { int to, 阅读全文