题解 | #KiKi和酸奶#

int main()
{
    int n=0,m=0,h=0;
    int ret=0;
    scanf("%d %d %d",&n,&h,&m);
    if(m%h!=0)
    {
      ret=m/h+1;
    }
    else  if(m%h==0)
    {
     ret=m/h;
    }
    else
    {
        ret=m/h;
    }
    printf("%d",n-ret);

    return 0;
}