Submission #3907591


Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using vi = vector<i64>;
using vvi = vector<vi>;

int main() {
    int n, m;
    cin >> n >> m;
    vvi adj(n + m);
    for (int i = 0; i < n; i++) {
        int k;
        cin >> k;
        for (int j = 0; j < k; j++) {
            int a;
            cin >> a;
            a--;
            adj[i].push_back(n + a);
            adj[n + a].push_back(i);
        }
    }

    vi visited(n + m);
    function<void(int, int)> dfs = [&](int v, int p) {
        visited[v] = 1;
        for (int s : adj[v]) {
            if (s != p && !visited[s]) {
                dfs(s, v);
            }
        }
    };

    dfs(0, -1);

    int ok = 1;
    for (int i = 0; i < n; i++) {
        if (!visited[i]) {
            ok = 0;
            break;
        }
    }
    cout << (ok ? "YES" : "NO") << endl;
}

Submission Info

Submission Time
Task C - Interpretation
User xuzijian629
Language C++14 (GCC 5.4.1)
Score 400
Code Size 902 Byte
Status AC
Exec Time 62 ms
Memory 10356 KB

Judge Result

Set Name sample dataset1 dataset2
Score / Max Score 0 / 0 200 / 200 200 / 200
Status
AC × 2
AC × 12
AC × 27
Set Name Test Cases
sample sample-01.txt, sample-02.txt
dataset1 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt
dataset2 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt, sample-01.txt, sample-02.txt
Case Name Status Exec Time Memory
01-01.txt AC 1 ms 256 KB
01-02.txt AC 2 ms 256 KB
01-03.txt AC 2 ms 384 KB
01-04.txt AC 2 ms 384 KB
01-05.txt AC 2 ms 256 KB
01-06.txt AC 2 ms 384 KB
01-07.txt AC 2 ms 384 KB
01-08.txt AC 2 ms 384 KB
01-09.txt AC 2 ms 256 KB
01-10.txt AC 2 ms 384 KB
02-01.txt AC 49 ms 7424 KB
02-02.txt AC 51 ms 7552 KB
02-03.txt AC 48 ms 6144 KB
02-04.txt AC 62 ms 8704 KB
02-05.txt AC 56 ms 7680 KB
02-06.txt AC 62 ms 8704 KB
02-07.txt AC 58 ms 7552 KB
02-08.txt AC 40 ms 7280 KB
02-09.txt AC 56 ms 10356 KB
02-10.txt AC 47 ms 7284 KB
02-11.txt AC 46 ms 7284 KB
02-12.txt AC 47 ms 7168 KB
02-13.txt AC 46 ms 7168 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 1 ms 256 KB