hdu1049

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