void Lee()
{
    int i, j, iUrmator, jUrmator;
    park[l][c] = 1;
    coada.push(make_pair(l,c));
    while(!coada.empty())
    {
        i = coada.front().first;
        j = coada.front().second;
        coada.pop();
        for(int directie = 0; directie < 4; directie++)
        {
            iUrmator = i + di[directie];
            jUrmator = j + dj[directie];
            if( valid(iUrmator,jUrmator) && park[iUrmator][jUrmator] == 0 )
            {
                park[iUrmator][jUrmator] = park[i][j] + 1;
                coada.push(make_pair(iUrmator,jUrmator));
            }
        }
    }
}