oj.uz

Submission #918944

# Submission time Handle Problem Language Result Execution time Memory
918944 2024-01-30T21:45:27 Z NK_ Newspapers (CEOI21_newspapers) C++17
4 / 100
 1 ms 600 KB 
// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>

using namespace std;

#define nl '\n'
#define pb push_back
#define sz(x) int(x.size())

template<class T> using V = vector<T>;
using vi = V<int>;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	
	int N, M; cin >> N >> M;

	V<vi> adj(N); vi in(N), path(N);
	for(int i = 0; i < M; i++) {
		int u, v; cin >> u >> v; --u, --v;
		adj[u].pb(v);
		adj[v].pb(u);
		in[u]++, in[v]++;
	}

	if (M != N - 1) {
		cout << "NO" << nl;
		exit(0-0);
	}

	if (N == 1) {
		cout << "YES" << nl;
		cout << 1 << nl;
		cout << 1 << nl;
		exit(0-0);
	}

	if (N == 2) {
		cout << "YES" << nl;
		cout << 2 << nl;
		cout << 1 << " " << 1 << nl;
		exit(0-0);
	}

	for(int u = 0; u < N; u++) if (in[u] == 1) {
		for(auto& v : adj[u]) path[v] = 1;
	}

	for(int u = 0; u < N; u++) if (!path[u]) {
		for(auto& v : adj[u]) in[v]--;
	}

	vi ans;
	function<void(int)> dfs = [&](int u) {
		ans.pb(u); path[u] = 0;

		int chd = 0;
		for(auto& v : adj[u]) if (path[v]) {
			dfs(v); chd++;
		}

		if (chd >= 2) {
			cout << "NO" << nl;
			assert(false);
			exit(0-0);
		}

		ans.pb(u);
	};

	for(int u = 0; u < N; u++) if (path[u] && in[u] <= 1) dfs(u);

	cout << "YES" << nl;
	cout << sz(ans) << nl;
	for(auto& x : ans) cout << x + 1 << " ";
	cout << nl;

	exit(0-0);
}

Subtask #1
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
9 Incorrect 0 ms 344 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #2
4.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
6 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
7 Partially correct 0 ms 600 KB Failed to provide a successful strategy.
8 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
9 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
10 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
11 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
13 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
14 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
15 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
16 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
17 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
19 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
20 Partially correct 1 ms 344 KB Failed to provide a successful strategy.

Subtask #3
0.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
9 Incorrect 0 ms 344 KB Output isn't correct
10 Halted 0 ms 0 KB -