제출 #984337

#제출 시각아이디문제언어결과실행 시간메모리
984337alexddPrize (CEOI22_prize)C++17
0 / 100
16 ms428 KiB
#include<iostream> using namespace std; int n,m; signed main() { ios_base::sync_with_stdio(0);cin.tie(0); cin>>n>>m; int a,b; for(int i=1;i<=m;i++) { cin>>a>>b; } if(m!=n-1) { cout<<"NO\n"; return 0; } cout<<"YES\n"; return 0; }
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