#include <bits/stdc++.h>

using namespace std;

int main() {
    double a, b;
    cin >> a >> b;
    int cnt = 0;
    vector<int> p(30);
    while(b > 1e-8) {
        b *= 2;
        if (b >= 1) {
            p[cnt++] = 1;
            b -= 1;
        } else {
            p[cnt++] = 0;
        }
    }
    for(int i = 0; i < 20; ++i){
        cout << "1";
    }
    for(int i = cnt - 1; i >= 0; --i){
        if(p[i] == 1) cout <<"2";
        else cout << "1";
    }
    cout << endl;
}