70分，求调

七十分，不知道哪错了

#include <bits/stdc++.h>
using namespace std;
int main ()
{
    int s, v, m = 0, h = 0, ansm = 0, ansh = 0;
    cin >> s >> v;
    if (s / v == 0)
    {
        m = s / v;
    }
    else
    {
        m = s / v + 1;
    }
    m += 10;
    while(m != 0)
    {
        if (m / 60 > 0)
        {
            h ++;
            m -= 60;
        }
        else
        {
            break;
        }
    }
    if (h >= 8)
    {
        ansh = 24 + 8 - h - 1;
    }
    else 
    {
        ansh = 8 - h - 1;
    }
    ansm = 60 - m;
    if (ansm < 10)
    {
        cout << ansh << ":" << 0 << ansm;
    }
    else if (ansh < 10)
    {
        cout << 0 <<  ansh << ":" << ansm;
    }
    else
    {
        cout << ansh << ":" << ansm;
    }
    return 0;
}