#include<bits/stdc++.h>
using namespace std;
using Int = long long;

template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
Int ans=-1;
void dfs(Int x,Int y,Int d){
  if(x==y){
    if(ans<0) ans=d;
    chmin(ans,d);
    return;
  }
  if(d>20) return;
  dfs(y,x,d+1);
  dfs(x+y,x-y,d+1);
}
signed main(){
  Int x,y;
  cin>>x>>y;
  dfs(x,y,0);
  cout<<ans<<endl;
  return 0;
}