这是我的代码

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int s,v ,H,M,t;
    scanf("%d %d",&s,&v);
    if ((s/v)==0)
    t=s/v+10;
    else
    t=s/v+11;
    H=t%60;
    M=(t-H)/60;
    if (M<=7)
    {  if(H<=50)
        printf("0%d:%d",8-M-1,60-H);
    else
        printf("0%d:0%d",8-M-1,60-H);
    }
    if (M>=22)
    {
        if(H<=50)
        printf("0%d:%d",31-M,60-H);
         else
      printf("0%d:0%d",31-M,60-H);
    }

    if (M>7&&M<22)
    { if(H<=50)
        printf("%d:%d",31-M,60-H);
        else
      printf("%d:0%d",31-M,60-H);
    }
    return 0;
}