#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
ll n,m;


int main() {
	long double a,b;
	cin>>a>>b;
	for(int i=1;i<=20;i++) cout<<1;
	long double t=0.5;
	vector<int> ans;
	long double x=0;
	int cnt=0;
	while(b-x>1e-6) {
		if(x+t<=b) x+=t,ans.push_back(2);
		else ans.push_back(1);
		t*=0.5;
		cnt++;
	}
//	printf("%.10Lf\n",x);

	for(int i=ans.size()-1;i>=0;i--) {
		cout<<ans[i];

	}


		
	
	return 0;
}