#include <bits/stdc++.h>
using namespace std;
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;}
using Int = long long;
const char newl = '\n';


template<typename F>
struct FixPoint : F{
  FixPoint(F&& f):F(forward<F>(f)){}
  template<typename... Args>
  decltype(auto) operator()(Args&&... args) const{
    return F::operator()(*this,forward<Args>(args)...);
  }
};
template<typename F>
inline decltype(auto) MFP(F&& f){
  return FixPoint<F>{forward<F>(f)};
}

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);

  Int x,y,h;
  cin>>x>>y>>h;
  x*=1000;y*=1000;

  Int ans=0;
  MFP([&](auto dfs,Int a,Int b,Int c,Int d)->void{
        chmax(ans,d);
        if(a>c) dfs(a,b*2,c*4,d+1);
        if(b>c) dfs(a*2,b,c*4,d+1);
      })(x,y,h,0);

  cout<<ans<<endl;
  return 0;
}