一个代码
```cpp
#include<bits/stdc++.h>
using namespace std;
long tim,s,v,xiaoshi,fenzhong;
int main(){
cin>>s>>v;
if(s%v) tim=11+s/v;
else tim=10+s/v;
xiaoshi=tim/60;
fenzhong=tim%60;
xiaoshi=7-xiaoshi;
fenzhong=60-fenzhong;
if(xiaoshi<0) xiaoshi+=24;
if(xiaoshi<10) cout<<"0"<<xiaoshi<<":";
else cout<<xiaoshi<<":";
if(fenzhong==60) cout<<"00"<<endl;
else if(fenzhong<10) cout<<"0"<<fenzhong<<endl;
else cout<<fenzhong<<endl;
return 0;
}
```
by wininaction @ 2023-08-01 12:45:28