```c
#include<stdio.h>
int main(){
int s,v,t1,t2,h1,h2,min1,min2;
scanf("%d%d",&s,&v);
h2=8;
min2=0;
if(s/v==0) t2=s/v;
else t2=s/v+1;
t2+=10;
t1=t2/60;
t2=t2%60;
while(h2<t1) h2+=24;
h2=h2-t1;
if(min2<t2) {
h2--;
min2+=60;
}
min2=min2-t2;
h1=h2/10;
h2=h2%10;
min1=min2/10;
min2=min2%10;
printf("%d%d:%d%d\n",h1,h2,min1,min2);
return 0;
}
```
by XZIT22080200135 @ 2023-07-18 16:44:09
@[XZIT22080200135](/user/981343) ```
#include<iostream>
#include<cmath>
#include<cstdio>
using namespace std;
int main()
{
int s,v;
scanf("%d%d",&s,&v);
int walk=ceil(1.0*s/v)+10;
int fromzero=60*(24+8)-walk;
int hh=(fromzero/60)%24;
int m=fromzero%60;
printf("%02d:%02d\n",hh,m);
return 0;
}
```
by ZachekFalse @ 2023-07-18 16:44:34