@[lvjie14](/user/1487071)
```cpp
#include <bits/stdc++.h>
using namespace std;
int s, v, t;
int main(){
scanf("%d%d", &s, &v);
t = 480 - (s + v - 1) / v - 10;
if(t < 0) t += 1440;
printf("%02d:%02d", t / 60, t % 60);
return 0;
}
```
by Lisuyang @ 2024-10-03 22:26:56
另外，这怎么多了个%？
```cpp
scanf("%d%d%", &s, &v);
```
by Lisuyang @ 2024-10-03 22:29:41
~~你的WA绝对是格式化输入的锅~~
by Lisuyang @ 2024-10-03 22:30:50
还有：用于调试的代码为何不注释
by Lisuyang @ 2024-10-03 22:32:28
@[Lisuyang](/user/1275269) 大意了，提交答案的时候忘了删掉。
by lvjie14 @ 2024-10-04 15:49:23