using namespace std;

int main() { int n, q; cin >> n >> q;

vector<std::vector<int>> arr(n);

for (int i = 0; i < n; i++) {
    int size;
    cin >> size;

    arr[i].resize(size);

    for (int j = 0; j < size; j++) {
        cin >> arr[i][j];
    }
}

for (int k = 0; k < q; k++) {
    int i, j;
    cin >> i >> j;

    cout << arr[i][j] << endl;
}

return 0;

}

int n;
cin>>n;
int q;
cin>>q;
vector<vector<int>> arr(n);
for(int i=0;i<n;i++)
{
    int size;
    cin>>size;
    for(int j=0;j<size;j++)
    {
        int num;
        cin>>num;
        arr[i].push_back(num);
    }
}
for(int i=0;i<q;i++)
{
    int a,b;
    cin>>a>>b;
    cout<<arr[a][b]<<endl;
}

this has to be the worst worded question ever written.

the question is not clear.

int n,q; cin>>n>>q; vector> arr(n); for (int i=0;i>size; arr[i].resize(size); for (int j=0; j>arr[i][j]; } } while (q--) { int x,y; cin>>x>>y; cout<