```cpp
#include<bits/stdc++.h>
using namespace std;
double s,v,m;
int n,a,t,b;
int main(){
cin>>s>>v;
n=8*60+24*60;
t=ceil(s/v)+10;
n=n-t;
if(n>=24*60) n-=24*60;
b=n%60;
a=n/60;
if(a<10){
if(b<10){
cout<<"0"<<a<<":0"<<b;
}
else{
cout<<"0"<<a<<":"<<b;
}
}
else{
if(b<10){
cout<<a<<":0"<<b;
}
else{
cout<<a<<":"<<b;
}
}
}
```
by cute_ @ 2024-10-14 19:21:44
@[cute_](/user/1078846) 谢谢大佬,想问一下为什么要算24*60,能不能直接减
by kajews @ 2024-10-14 20:11:49
@[kajews](/user/1422339) 不可以的,因为是一天之内,也就可能在昨天下午开始出发,所以你的用24小时制
by _hellow @ 2024-10-15 20:33:24
@[_hellow](/user/1512964) 哦哦哦懂了,谢谢大佬
by kajews @ 2024-10-16 21:49:09