B.cpp

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define loop(i,a,b) for(ll i=a;i<b;i++)
#define testcases ll t;cin>>t;while(t--)
#define pb push_back
#define all(x) x.begin(), x.end()
#define dec(x) greater<x>()

int main()
{
	#ifndef ONLINE_JUDGE
	freopen("C:/Users/91731/Documents/input.txt","r",stdin);
	freopen("C:/Users/91731/Documents/output.txt","w",stdout);
	freopen("C:/Users/91731/Documents/error.txt","w",stderr);
    #endif
	
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	
	ll n,m,ans=0;
	cin>>n>>m;

	if(n==m)
		cout<<0;
	else if(m<n)
		cout<<n-m;
	else
	{
		while(n<m)
		{
			if(m%2==1)
				m++,ans++;
			else
				m=m/2,ans++;
		}
		ans+=n-m;
		cout<<ans;
		// cout<<m<<" "<<n;
	}
}