oj.uz

Submission #881962

# Submission time Handle Problem Language Result Execution time Memory
881962 2023-12-02T10:35:52 Z TAhmed33 Newspapers (CEOI21_newspapers) C++
8 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e3 + 25;
vector <int> adj[MAXN];
int n, m;
int cnt = 0;
void dfs (int pos, int par, int dep = 0) {
	if (dep == 3) {
		cnt++;
		return;
	}
	for (auto j : adj[pos]) if (j != par) dfs(j, pos, dep + 1);
}
int main () {
	cin >> n >> m;
	bool flag = 1;
	for (int i = 1; i <= m; i++) {
		int a, b;
		cin >> a >> b;
		if (a > b) swap(a, b);
		flag &= a + 1 == b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	if (m != n - 1) {
		cout << "NO\n";
		return 0;
	}
	if (flag) {
		cout << "YES\n";
		if (n == 1) {
			cout << "1\n1\n";
			return 0;
		}
		if (n == 2) {
			cout << "2\n2 2\n";
			return 0;
		}
		cout << 2 * (n - 2) << '\n';
		for (int i = 2; i < n; i++) cout << i << " ";
		for (int i = n - 1; i >= 2; i--) cout << i << " ";
		cout << '\n';
		return 0;
	}
	for (int i = 1; i <= n; i++) {
		if (adj[i].size() >= 3) {
			cnt = 0;
			dfs(i, -1);
			if (cnt >= 3) {
				cout << "NO\n";
				return 0;
			}
		}
	}
	cout << "YES\n";
}

Subtask #1
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 1 ms 348 KB Unexpected end of file - int32 expected
6 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #3
0.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 1 ms 348 KB Unexpected end of file - int32 expected
6 Halted 0 ms 0 KB -