#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <set>
#include <map>

using namespace std;
typedef long long ll;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    ll x, y, h;
    cin >> x >> y >> h;
    x *= 1000;
    y *= 1000;
    x *= (1<<20);
    y *= (1<<20);
    h *= (1<<20);
    int ans = 0;
    // cout << x << endl;
    for(int i = 0; i < (1<<20); i++){
        int cnt = 0;
        ll H = h;
        ll X = x;
        ll Y = y;
        for(int j = 0; j <= 20; j++){
            int m = (1<<j);
            if(m&i){
                if(X > H){
                    cnt++;
                    H *= 2;
                    X /= 2;
                }
            }else{
                if(Y > H){
                    cnt++;
                    H *= 2;
                    Y /= 2;
                }
            }
        }
        ans = max(ans, cnt);
    }
    cout << ans << endl;
}