Submission #73487701

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Source Code Expand

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


void sol();

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    sol();
    return 0;
}

void sol() {
    int n, m;
    cin >> n >> m;

    unordered_map<int,bool> Hash;
    for (int i = 1; i <= m; ++i) {
        Hash[i] = true;
    }

    vector<int> ans(n,0);
    for (int i = 0; i < n; ++i) {
        int l;
        cin >> l;
        for (int j = 0; j < l; ++j) {
            int p;
            cin >> p;
            if(!ans[i]) {
                if(Hash[p]) {
                    ans[i] = p;
                    Hash[p] = false;
                }
            }
        }
    }

    for (int i = 0; i < n; ++i) {
        cout << ans[i] << '\n';
    }
}

Submission Info

Judge Result