HDU 1049 Climbing Worm

#include <cstdio>

int main()

{

    int cnt,h,d,u;

    while(scanf("%d%d%d",&h,&d,&u)!=EOF)

    if (h!=0)

    {

        cnt=0;

        cnt+=(2*((h-d)/(d-u)));

        if ((h-d)%(d-u)!=0) 

        cnt+=2;

        cnt+=1;

        printf("%d\n",cnt);

    }

    return 0;

}

翻译：worm 虫子