int min(vector<vector<int>> macierz){
    int minimum = macierz[0][0];

    for(int i = 0; i < macierz.size(); i++){
        int minimumWiersza = min(macierz[i]);

        if(minimumWiersza < minimum){
            minimum = minimumWiersza;
        }
    }

    return minimum;
}