#include<bits/stdc++.h>
using namespace std;
#define endl '\n'
typedef long long ll;
const int N=2e5+10;
const double eps=1e-4;

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

    double p=1.0;
    for(int k=1;k<=50;k++)
    {
        vector<int> res;
        p*=0.5;
        double Las= b- a*p;
       
        for(int i=1;i<=k;i++)
        {
            if(fabs(Las)<eps)
                Las=0;
            Las=Las*2.0;
            if(Las>=1)
            {
                res.push_back(2);
                Las-=1;
            }
            else
                res.push_back(1);
        }

        if(fabs(Las)<eps||k==50)
        {
            for(int i=res.size()-1;i>=0;i--)
                cout<<res[i];
            return ;
        }
    }

    bool pri=true;
    assert(pri==false);
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int T;
    //cin>>T;
    T=1;

    while(T--)
        solve();
    return 0;
}