U

#include <iostream>
using namespace std;

int main()
{
    int a, b, n = 0;
    cin >> a >> b;
    while (a != b)
    {
        if (b > a)
            if (b % 2 == 0)
            {
                b /= 2;
                n++;
            }
            else
            {
                b++;
                n++;
            }

        else if (a > b)

        {
            b++, n++;
        }
    }
    cout << n << endl;
    return 0;
}