#include<bits/stdc++.h>
using namespace std;
using i64=long long;
using ll=long long;
const int N=1e7+10,mod=998244353;

double a, b;

void solve(){
    std::cin >> a >> b;
    std::string s;
    double x = 0.5;
    for (int i = 1; i <= 50; ++i) {
        if (b >= 1e-4) {
            if (b >= x) {
                b -= x;
                s += '2';
            }
            else s += '1';
            x = x * 0.5;
        }
    }
    while (s.size() < 50) s += '1';
    std::reverse(s.begin(), s.end());
    std::cout << s;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--) solve();
}