#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=1e5+5;
inline int read()
{
    int x=0,f=1;
    char ch=getchar();
    while(ch<'0'||ch>'9')
	{
        if(ch=='-')
            f=-1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9')
	{
        x=(x<<1)+(x<<3)+(ch^48);
        ch=getchar();
    }
    return x*f;
}
ll n,m,k,t;
double a,b,s=0.5;
vector<int>v;
map<double,int>p;
void dfs(double x)
{
/*	cout<<x<<" "<<x-b<<endl;
	for(int i=0;i<v.size();i++)
			{
				cout<<v[i];
			}
			cout<<endl;*/
	if(v.size()>=50) return;
	if(p[x]==1||t==1) return;
	
	if(x-b<=0.00001&&x-b>=-0.00001)
	{
		
			for(int i=0;i<v.size();i++)
			{
				cout<<v[i];
			}
			t=1;
			return ;
	
	}
	p[x]++;
	v.push_back(1);
	dfs(s*x);
	v.pop_back();
	v.push_back(2);
	dfs((x-1)*s+1.0);
	v.pop_back();
}
int main()
{
//	double a,b;
	cin>>a>>b;
	dfs(a);
}