#include <iostream>
using namespace std;
int n, x, a;
int main()
{
    cin >> n >> x;
    if (n >= x)
        cout << n - x;
    else
    {
        while (n < x)
        {
            if (x & 1)
                x += 1;
            else
                x /= 2;
            a += 1;
        }
        cout << a + n - x;
    }
    return 0;
}//代码已AC