Submission #572451

#	Time	Username	Problem	Language	Result	Execution time	Memory
572451		valerikk	Newspapers (CEOI21_newspapers)	C++17	4 / 100	2 ms	468 KiB

newspapers

#include <bits/stdc++.h>

using namespace std;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n, m;
	cin >> n >> m;

	for (int i = 0; i < m; ++i) {
		int u, v;
		cin >> u >> v;
	}

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

	cout << "YES\n";

	if (n == 1) {
		cout << "1\n1\n";
		return 0;
	}

	if (n == 2) {
		cout << "2\n1 1\n";
		return 0;
	}

	cout << 2 * n - 4 << "\n";
	cout << 2 << " " << 2 << " ";
	for (int i = 3; i <= n - 1; ++i) {
		cout << i << " " << i - 2 << "\n";
	}
	cout << "\n";
	return 0;
}

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