#include <bits/stdc++.h>

double a,b;
const double eps=1e-4;
bool f[33];
int main() {
    std::cin>>a>>b;
    while (std::abs(a-0)>eps) {
        std::cout<<1;
        a=a*0.5;
    }
    double base=1.0;
    double c=0;
    for (int i=1;i<=30;i++) {
        base*=0.5;
        if (c+base<b) {
            c+=base;
            f[i]=true;
        }
    }
    for (int i=30;i>=1;i--) {
        if (f[i]) {
            std::cout<<2;
            a=(a+1)/2;
        } else {
            std::cout<<1;
            a=a/2;
        }
        // std::printf("[%.4.lf]",a);
    }
    std::cout<<std::endl;
}