void sorting(int * arr, int n)
{
    for(int i = 0; i < n; i++)
    {
        int min_val = 999666999;
        int min_idx = -1;
        for(int j = i; j < n; j++)
        {
            if(min_val < arr[j])
            {
                min_val = arr[j];
                min_idx = j;
            }
        }
        swap(arr[i], arr[min_idx]);
    }
}