@[Chenweihao123](/user/757300) 求关注～
注意跨天。
```cpp
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int s, v, t;
cin >> s >> v;
t = ceil(s * 1.0 / v) + 10;
int n = 8 * 60 + 24 * 60;
n -= t;
if (n >= 24 * 60)
{
n -= 24 * 60;
}
int shi = n / 60;
int fen = n % 60;
if (shi < 10)
{
if (fen < 10)
{
cout << 0 << shi << ":0" << fen;
}
else
{
cout << 0 << shi << ":" << fen;
}
}
else
{
if (fen < 10)
{
cout << shi << ":0" << fen << endl;
}
else
{
cout << shi << ":" << fen << endl;
}
}
return 0;
}
```
by JustinXiaoJunyang @ 2022-08-20 16:01:06