#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<vector<int>> vec(2, vector<int>(3, 1));
    vec[0].push_back(2);
    vec.push_back(vector<int>(2, 3));
    cout << vec[1][2] + vec[2][1] << endl;
    return 0;
}