求告知是哪些地方没有考虑到，测试点有三个没过

#include <stdio.h>

int main() {
    int s,v,totalTime,time,h,m;
    scanf("%d %d",&s,&v);
    if(s%v==0)
    {
        totalTime=s/v+10;
    }
    else
    {
        totalTime=s/v+11;
    }
    time=480-totalTime;
    h=time/60;
    m=time-h*60;
    printf("%02d:%2d",h,m);
    return 0;
}