Submission #1276804

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276804		sepanta	Newspapers (CEOI21_newspapers)	C++17	4 / 100	1 ms	680 KiB

newspapers

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

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

    int N, M;
    cin >> N >> M;

    vector<vector<int>> adj(N + 1);
    for (int i = 0; i < M; i++) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    vector<int> color(N + 1, -1);
    bool bipartite = true;
    vector<int> partA, partB;

    queue<int> q;
    color[1] = 0;
    q.push(1);

    while (!q.empty() && bipartite) {
        int u = q.front(); q.pop();
        for (int v : adj[u]) {
            if (color[v] == -1) {
                color[v] = 1 - color[u];
                q.push(v);
            } else if (color[v] == color[u]) {
                bipartite = false;
                break;
            }
        }
    }

    if (!bipartite) {
        cout << "NO\n";
        return 0;
    }

    for (int i = 1; i <= N; i++) {
        if (color[i] == 0) partA.push_back(i);
        else partB.push_back(i);
    }

    cout << "YES\n";
    cout << N << "\n";

    for (int u : partA) cout << u << " ";
    for (int v : partB) cout << v << " ";
    cout << "\n";

    return 0;
}

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