#include <iostream>
#include <vector>
#include <map>
#include <utility>
#include <algorithm>
int main()
{
    std::vector<std::map<int, unsigned char>>grid =
    {
        {std::make_pair(1,'-'), std::make_pair(2,'-'), std::make_pair(3,'-') },
        {std::make_pair(4,'-'), std::make_pair(5,'-'), std::make_pair(6,'-') },
        {std::make_pair(7,'-'), std::make_pair(8,'-'), std::make_pair(9,'-') }
    };
 
    std::cout << grid.at(0).at(1); // Same as grid.at(0)[1]
    std::cout << grid.at(0).begin()->second;
 
}

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