#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define dd double
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define pii pair<int, int>

const int N = 1e6 + 10;
#define esp 1e-4
void solve()
{
	dd a,b;
	cin>>a>>b;
	if(fabs(a-b)<=esp)return ;
	vector<int>B,A;
	while(fabs(a-(int) a)>esp)A.push_back(1),a/=2;
	a=0;
	for(dd now=0.5;fabs(a-b)>esp;now/=2){
		if(a+now<b)B.push_back(2),a+=now;
		  else B.push_back(1);
	}
	reverse(B.begin(),B.end());
	if(A.size()+B.size()>50)while(1);
	for(auto it:A)printf("%d",it);
	for(auto it:B)printf("%d",it);
}

signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	int _ = 1;
	while (_--)
		solve();
    return 0;
}