Submission #912839

#	Time	Username	Problem	Language	Result	Execution time	Memory
912839		juliany2	Newspapers (CEOI21_newspapers)	C++17	0 / 100	1 ms	348 KiB

newspapers

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()

const int N = 1007;
int n, m;
vector<int> adj[N];

int main() {
    cin.tie(0)->sync_with_stdio(false);

    cin >> n >> m;

    for (int i = 1; i <= m; i++) {
        int u, v;
        cin >> u >> v;

        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    if (m != n - 1) {
        cout << "NO" << '\n';
        return 0;
    }

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

    return 0;
}

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