제출 #602778

#제출 시각아이디문제언어결과실행 시간메모리
602778cadmiumskyNewspapers (CEOI21_newspapers)C++14
4 / 100
1 ms212 KiB
#include <bits/stdc++.h> using namespace std; const int nmax = 1e3 + 5; vector<int> g[nmax]; int main() { int n, m; cin >> n >> m; if(m == n - 1) { cout << "YES\n1\n1\n"; } else if(m == n) { for(int i = 0, x, y; i < m; i++) { cin >> x >> y; g[x].push_back(y); g[y].push_back(x); } for(int i = 1; i <= n; i++) { if(g[i].size() != 2) { cout << "NO\n"; return 0; } } cout << "YES\n1\n1\n"; } else cout << "NO\n"; }
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