AC代码
```cpp
#include <bits/stdc++.h>
using namespace std;
int s, v, m = 470;
int main(){
cin >> s >> v;
if(s % v == 0){
m -= (s / v);
}
else{
m -= (s / v + 1);
}
if(m < 0){
m = 1440 + m;
}
if(m / 60 <= 9){
cout << 0;
}
cout << m / 60 << ":";
if(m % 60 <= 9){
cout << 0;
}
cout << m % 60;
return 0;
}
```
@[Undertakers](/user/1425809) 求关注
by YOU_QAQ_xiaohao @ 2024-10-01 18:03:22
@[Undertakers](/user/1425809) s/v不为整数的情况是不是没考虑，int t的话会略去小数部分吧，这样时间是不是应该加一
by SQH2004 @ 2024-10-01 20:15:29