#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
int n,u,d;
int result;
int temp;
int i;
while(cin>>n&&n>0)
{
cin>>u>>d;
result=0;
temp=0;
temp=n-u;
int t=temp%(u-d);
if(t!=0)
{
temp=temp+u-d-t;
}
result=2*temp/(u-d)+1;
cout<<result<<endl;
