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;
}