#include<bits/stdc++.h>
// #define int long long
using namespace std;

const double eps=1e-5;
// int n,m;

void solve()
{
    double a,b;
	cin>>a>>b;

	vector<int> q;
	double t=b;

	while(fabs(t)>eps)
	{
		if(t >= 1)
		{
			q.push_back(1);
			t -= 1;
		}
		else
		{
			q.push_back(0);
		}
		t*=2;
	}

	vector<int> ans;
	while(fabs(a)>eps)
	{
		a*=0.5;
		ans.push_back(1);
	}

	int c=ans.size();
	for(int i=min(50-c,(int)(q.size()-1));i>=1;i--)
	{
		if(q[i]) ans.push_back(2);
		else ans.push_back(1);
	}

	for(int i=0;i<ans.size();i++) cout<<ans[i];
	// for(auto iter : q)
	// 	cerr << iter << " ";
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t=1;
    // cin>>t;

    while(t--)
        solve();

    return 0;
}