```cpp
#include<bits/stdc++.h>
using namespace std;
double s=0.0,v=0.0;
int h,m;
int main()
{
cin>>s>>v;
m=10+ceil(s/v);
h=ceil(m*1.0/60);
m=60-m%60;
h=8-h;
if(h<0)
h=24+h;
if(h<10)
cout<<"0";
cout<<h<<":";
if(m<10)
cout<<"0";
cout<<m;
return 0;
}
```
by JI_CI @ 2022-10-04 20:05:58
（路过）
by JI_CI @ 2022-10-04 20:06:26
@[bai_yu](/user/782733)
这是c++吗？还没学[笑哭]
by fightclub @ 2022-10-04 20:57:07
（严肃）差不多
by JI_CI @ 2022-10-04 21:11:40
```c
#include <bits/stdc++.h>
using namespace std;
int main()
{
int a, b;
scanf("%d %d", &a, &b);
int m = ceil((double)a / (double)b + 10);
int start_time = (24 + 8) * 60 - m;
int th = 24 * 60;
if (start_time > th) {
start_time -= th;
}
int hh = start_time / 60;
int mm = start_time % 60;
printf("%02d:%02d\n", hh, mm);
return 0;
}
```
by xiaoqing123456 @ 2022-10-05 11:32:26
路过
by liyuncheng @ 2022-10-06 14:33:01