#include<bits/stdc++.h>
using namespace std;
int n,m;
struct Node{
	int x,step;
};
queue<Node> q;
bool panduan(int x,int step){
	if(x==m){
		cout<<step;
		return true;
	}
	else{
		q.push({x,step});
		return false;
	}
}
int main(){
	cin>>n>>m;
	q.push({n,0});
	while(!q.empty()){
		int x=q.front().x;
		int step=q.front().step;
		//cout<<x<<step<<endl;
		bool f=false;
		f=f||panduan(x+1,step+1);
		f=f||panduan(x-1,step+1);
		f=f||panduan(x*2,step+1);
		if(f) return 0;
		q.pop();
	}
	return 0;
}

/**************************************************************
	Problem: 2111
	User: wuzhehan
	Language: C++
	Result: Memory Limit Exceed
****************************************************************/