include<bits/stdc++.h>

using namespace std;

int main()
{
long long a,b,cnt=0;
cin>>a>>b;
if(b<a) cnt=a-b;
else{
while(a2<=b){
a=a * 2;
cnt++;
};
int c=b-a;
int d=a2-b+1;
if(c>d) cnt+=d;
else cnt+=c;
}
cout<<cnt;
return 0;
}