#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>
#include<utility>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

struct fast_io {
	fast_io(){
		std::cin.tie(nullptr);
		std::ios::sync_with_stdio(false);
	};
} fio;

int solve(int x, int y, int h){
	int res = 0;
	
	if(x > h) res = max(solve(x, y * 2,h * 4)+1, res);
	if(y > h) res = max(solve(x *  2, y,h * 4)+1, res);
	
	return res;
}

signed main(){
	cout<<fixed<<setprecision(10);
	
	int x, y, h;
	
	cin>>x>>y>>h;
	
	x *= 1000;
	y *= 1000;
	
	cout<<solve(x,y,h)<<endl;
	
	
	return 0;
}