@[bestman_me](/user/1031281)
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
int sum = 10;
int s,v,n,m;
cin>>s>>v;
n = s/v;
if(s-n*v!=0) n++;
sum+=n;
if(sum<60){
cout<<"07:";
if(60-sum<10) cout<<"0"<<60-sum<<endl;
else cout<<60-sum<<endl;
}
else{
m = sum/60;
sum = sum-m*60;
if(m>=8) cout<<8-m+23<<":";
else cout<<"0"<<7-m<<":";
if(60-sum<10) cout<<"0"<<60-sum<<endl;
else cout<<60-sum<<endl;
}
return 0;
}
```
应该是`7-m`，不是`8-m`。
by GoodLuckCat @ 2023-09-02 20:39:20
@[Huyuhao0215](/user/916579)
大佬，为啥输入“470 1”的结果为23:60？
有解决办法吗
by bestman_me @ 2023-09-02 20:51:55
@[bestman_me](/user/1031281) 我的代码是这样的
```cpp
#include<cmath>
#include<iostream>
using namespace std;
int main()
{
int s,v,h,m,a;
cin>>s>>v;
a=1910-ceil((double)s/(double)v);
h=a/60;
m=a%60;
if(h>=24)h-=24;
if(h<10)cout<<0;
cout<<h<<":";
if(m<10)cout<<0;
cout<<m<<endl;
return 0;
}
```
by GoodLuckCat @ 2023-09-02 21:03:07
```
#include <bits/stdc++.h>
using namespace std;
int s, v, wt, gt, gh, gm;
int main(){
cin >> s >> v;
wt = s/v;
if(s%v!=0)
wt++;
gt = (480 + 2880 - 10 - wt)%1440;
gh = gt/60;
if(gh<10)
cout << 0;
cout << gh << ':';
gm = gt%60;
if(gm<10)
cout << 0;
cout << gm << endl;
return 0;
}
```
by GipsyAvenger1 @ 2023-09-03 15:52:56
@[Huyuhao0215](/user/916579)
ceil是什么意思呀
by bestman_me @ 2023-09-08 21:01:18