// practice prob A
// 2002 ECNA ACM Prgm Contest

#include<iostream.h>

int main(void){
  int n,u,d,days,height,up;

  cin>>n>>u>>d;
  while(n>0){
    height=days=0;
    up=1;
    while(height<n){
      days++;
      if(up==1)
        height += u;
      else
	height -= d;
      up *=   -1;
    }
    cout<<days<<endl;
    cin>>n>>u>>d;
  }
}