struct {map<string,vector<string>>::iterator it; int i; } s;
int k = 0;
for ( s.it = m.begin(), s.i = 0; s.it != m.end(), s.i < size; s.i+=2)
{
    while (k != integer_array[s.i] && k < size)
    {
            s.it++;
        k++;
    }
    if (k == integer_array[s.i])
    {
        cout << s.it.first << endl; // this line does not complie
        k = 0;
            s.it = m.begin();
    }
}

cout << s.it.first << endl;

cout << s.it->first << endl;