vector<int> crear_individuo(int days, int nurses, vector<vector<int> > c_matrix){
    vector<vector<int> > c_matrix_aux;
    vector<int> individuo(days*nurses, -1);

    for (int i = 0; i < days; i++){
        for(int j = 0; j < 4; j++){
            //turno = rand() % 4;
            while(c_matrix[i][j] > 0){
                int enfermera = rand() % (nurses - 1);
                while(individuo[enfermera + (i*nurses)] != -1){
                    enfermera = rand() % (nurses - 1);
                }
                individuo[enfermera + (i*nurses)] = j;
                c_matrix[i][j] -= 1;
            }
            //individuo.push_back(turno);

        }
    }

    return individuo;
}