#include<bits/stdc++.h>
using ll=long long;
using PII=std::pair<int,int>;
#define int ll
const int N=3e5+10,mod=998244353;
const double eps=1e-4;
int n,k;
double a,b;
bool check(double s)
{
    if(std::fabs(s-b)>eps) return false;
    else return true;
}
void solve()
{
    std::cin>>a>>b;
    double s=0.5;
    ll cnt=0;
    while(std::fabs(a-b)>eps&&cnt<50)
    {
        if(check((a+1)*s))
        {
            std::cout<<2;
            break;
        }
        std::cout<<1;
        a*=s;
        cnt++;
    }
}
signed main()
{
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int t=1;
    //std::cin>>t;
    while(t--)
    {
        solve();
    }
    return 0;
}