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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll x, y, h;
    cin >> x >> y >> h;
    set<pair<ll,ll>> S;
    function<ll(ll,ll,ll)> dfs = [&](ll x, ll y, ll h){
        if(S.count(make_pair(x, y)))return 0ll;
        S.insert(make_pair(x, y));
        ll res = 0;
        if(x > h)res = max(res, dfs(x, y * 2, h * 4) + 1);
        if(y > h)res = max(res, dfs(x * 2, y, h * 4) + 1);
        return res;
    };
    cout << dfs(x * 1000, y * 1000, h) << '\n';
}