#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, m, kol =0;
    cin >> n >> m;
    while(n < m)
    {
        if(m % 2 == 1 )
        {
            kol++;
            m++;
        }
        kol++;
        m /= 2;
    }
    kol += n - m;
    cout << kol;
    return 0;

}