#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int a,b;
int cnt;

int main() {
    cin>>a>>b;

    if(a>=b)cout <<a-b;
    else {
        int a1,a2;

        while(a<b) {
            a1=abs(a-b);
            a=a<<1;
            a2=abs(a-b);
            cnt++;
        }


        if(a1<a2)cnt--;
        int tmp;
        tmp=a1<a2?a1:a2;

        cout<<cnt+tmp<<endl;
    }

}