#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main()

{

    ll x, y;

    scanf("%lld %lld", &x, &y);

    ll maxx = y;

    ll midd = y;

    ll minn = y;

    ll p = ;

    ll q = ;

    ll count = ;

    while()

    {

        p = maxx;

        q = midd;

        maxx = midd + maxx - ;

        midd = p;

        minn = q;

        count++;

        if (maxx >= x)

        {

            cout << count +  << endl;

            return ;

        }

    }

    return ;

}