제출 #620910

#제출 시각아이디문제언어결과실행 시간메모리
620910berrNewspapers (CEOI21_newspapers)C++17
4 / 100
2 ms340 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long

int32_t main()
{
    ios_base::sync_with_stdio(false); cin.tie(0);
    
    int n, m; cin>>n>>m;
    for(int i=0; i<m; i++)
    {
        int x, y; cin>>x>>y;
    }

    if(n==1) cout<<"YES\n"<<"2 1 1"<<"\n";
    else
    {
    cout<<"YES\n"<<n*2-2<<" \n";
    for(int i=1; i<n; i++)
    {
        cout<<i<<" "<<i<<" "; 
    }
}
}
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