Submission #1047580

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047580		12345678	Newspapers (CEOI21_newspapers)	C++17	4 / 100	1 ms	604 KiB

newspapers

#include <bits/stdc++.h>

using namespace std;

const int nx=1e3+5;

int n, m, u, v, dsu[nx], f;

int find(int x)
{
    if (dsu[x]==x) return x;
    return dsu[x]=find(dsu[x]);
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=n; i++) dsu[i]=i;
    for (int i=1; i<=m; i++)
    {
        cin>>u>>v;
        if (find(u)==find(v)) f=1;
        dsu[find(u)]=find(v);
    }
    if (f) cout<<"NO";
    else
    {
        cout<<"YES\n";
        cout<<n<<'\n';
        for (int i=1; i<=n; i++) cout<<i<<' ';
    }
}

• Subtask 1: 0 / 12
• Subtask 2: 4 / 8
• Subtask 3: 0 / 80