```c
#include<bits/stdc++.h>
using namespace std;
int main()
{
double s,v,t;
cin>>s>>v;
t=ceil(s/v)+10;
int h=ceil(t/60);
int m=(int)t%60;
printf("%.02d:%.02d",(8-h+24)%24,(0-m+60)%60);
return 0;
}
```
@[Xiaoovo](/user/1408719)
by yuanzekai123 @ 2024-10-13 16:45:17