#include<stdio.h>
#include<string.h>
#include<queue>
#define MAX 1000100
using namespace std;
int n,m;
int vis[MAX];
struct node
{
	int x;
	int step;
	friend bool operator < (node a,node b)
	{
		return a.step>b.step;
	}
};
int judge(int x)
{
	if(x < 0||x > MAX||vis[x])
	    return 0;
	return 1;
}
void bfs(int n,int k)
{
	int i,j;
	priority_queue<node>q;
	node beg,end;
	beg.x=n;
	beg.step=0;
	q.push(beg);
	vis[n]=1;
	while(!q.empty())
	{
		beg=q.top();
		q.pop();
		if(beg.x==k)
		{
			printf("%d\n",beg.step);
			return ;
		}
		end.x=beg.x-1;
		if(judge(end.x))
		{
			vis[end.x]=1;
			end.step=beg.step+1;
			q.push(end);
		}
		end.x=beg.x+1;
		if(judge(end.x))
		{
			vis[end.x]=1;
			end.step=beg.step+1;
			q.push(end);
		}
		end.x=beg.x*2;
		if(judge(end.x))
		{
			vis[end.x]=1;
			end.step=beg.step+1;
			q.push(end);
		}
	}
}
int main()

{
	int i;
	while(scanf("%d%d",&n,&m)!=EOF)
	{
		memset(vis,0,sizeof(vis));
		bfs(n,m);
	}
	return 0;
}