#include <bits/stdc++.h>
#define ll long long int
#define w(t) int t;cin>>t;while(t--)
using namespace std;

int main() {
    ll l,b,h,count=0;;
    cin>>l>>b>>h;
    l*=1000;
    b*=1000;
    while(1)
    {
        if(l>h)
        {
            l/=2;
            count++;
            h*=2;
        }
        else if(b>h)
        {
            b/=2;
            count++;
            h*=2;
        }
        else 
        break;
    }
    cout<<count;
	
	return 0;
}