#include <iostream>
#include <vector>
using namespace std;
int main() {
    vector<vector<int>> arr(3, vector<int>(2, 1));
    arr[1].push_back(3);
    arr[2][0] = 5;
    cout << arr[1].size() << "," << arr[2][0] << "," << arr[0][1];
    return 0;
}