Submission #601784

#	Time	Username	Problem	Language	Result	Execution time	Memory
601784		Valaki2	Newspapers (CEOI21_newspapers)	C++14	4 / 100	1 ms	212 KiB

newspapers

#include <bits/stdc++.h>
using namespace std;

#define pb push_back

void no() {
    cout << "NO\n";
    exit(0);
}

void solve() {
    int n, m;
    cin >> n >> m;
    if(n == 1) {
        cout << "YES\n1\n1\n";
        return;
    }
    if(m != n - 1) {
        no();
    }
    vector<int> deg(1 + n, 0);
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        deg[a]++;
        deg[b]++;
    }
    int cnt = 0;
    for(int i = 1; i <= n; i++) {
        if(deg[i] == 1) {
            cnt++;
        }
    }
    if(cnt != 2) {
        no();
    }
    cout << "YES\n1\n1\n";
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
    return 0;
}

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