```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
double s,v,m;
int n,a,t,b;
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;
}
return 0;
}
```
by xhl_leo @ 2024-08-08 15:40:27
```cpp
#include<bits/stdc++.h>
using namespace std;
double s,v,cnt;
int ans,h,m,tmp,tot=8*60+24*60;
int main()
{
scanf("%lf%lf",&s,&v);
cnt=s/v;
tmp=ceil(cnt);
tmp+=10;
tot-=tmp;
if(tot>=24*60) tot-=24*60;
h=tot%60;
tot/=60;
m=tot;
printf("%02d:%02d",m,h);
return 0;
}
```
by linruicong @ 2024-08-08 15:41:45
求关
by xhl_leo @ 2024-08-08 15:42:00
求关
by linruicong @ 2024-08-08 15:43:24
@[xhl_leo](https://www.luogu.com.cn/user/1208985)，已关
by linruicong @ 2024-08-08 15:44:21
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
int a=7,t,h,b;
float c,s,v;
cin>>s>>v;
c=s/v;
t=s/v;
if(c-t>0){
t=t+1;
}
h=t/60;
t=t%60;
if(t>50){
t=t-50;
b=60-t;
a=6;
a=a-h;
}
else{
b=50-t;
a=a-h;
}
if(a<0){
a=24+a;
if(a>=9)
cout<<a<<":"<<b;
}
else
if(b>=10)
cout<<"0"<<a<<":"<<b;
else cout<<"0"<<a<<":0"<<b;
return 0;
}
```
by dhc130223 @ 2024-08-09 21:41:03