@[xfit](/user/1299979)
```cpp
#include<bits/stdc++.h>
using namespace std;
int s, v, ans, sum, num, cnt;
int main(){
cin>>s>>v;
ans=s/v;
if(s%v!=0)
ans++;
sum=(480+2880-10-ans)%1440;
num=sum/60;
if(num<10)
cout<<0;
cout<<num<<':';
cnt=sum%60;
if(cnt<10)
cout<<0;
cout<<cnt;
return 0;
}
```
求关qwq
by 文锡 @ 2024-10-09 19:53:16
@[文锡](/user/941628) 已关
by xfit @ 2024-10-09 21:17:48