HDU 1049

#include <stdio.h>int main(){    int n,u,d,i,m;    scanf("%d%d%d",&n,&u,&d);    while(n!=0)    {        for(i=n-u;i<n;i++)            if(i%(u-d)==0)                break;        printf("%d\n",i/(u-d)*2+1);        scanf("%d%d%d",&n,&u,&d);    }    return 0;}