Submission #528148

#	Time	Username	Problem	Language	Result	Execution time	Memory
528148		jesus_coconut	Newspapers (CEOI21_newspapers)	C++17	0 / 100	0 ms	312 KiB

newspapers

#include <bits/stdc++.h>

using namespace std;

int n, m;
vector<vector<int>> adj;

void load() {
  cin >> n >> m;
  adj.resize(n);
  for (int i = 0; i < m; ++i) {
	int a, b;
	cin >> a >> b;
	--a; --b;
	adj[a].push_back(b);
	adj[b].push_back(a);
  }
}

void solve2() {
  if (n <= 3) {
	cout << "YES\n";
	cout << "2\n2 2\n";
	return;
  }
  cout << "YES\n";
  cout << 2 * n - 1 << '\n';
  for (int i = 1; i <= n; ++i) {
	cout << i << ' ';
  }
  for (int i = n; i > 1; --i) {
	cout << i << ' ';
  }
  cout << '\n';
}

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

  load();
  if (n == 1) {
	cout << "YES\n";
	cout << "1\n1\n";
  }

  if (m == n-1) {
	solve2();
  }

  return 0;
}

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