#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ep emplace_back
#define fi first
#define se second
using ll=long long;
using ull=unsigned long long;
#define pi pair<int, int>
#define pll pair<long long,long long>
#ifdef LOCAL
#include"D:/Administrator/Documents/vscode/algo/debug.h"
#else
#define debug(...) 42
#endif

mt19937 mrand(random_device{}());
//模板区域~~~~~~~

//模板结束~~~~~~~

signed main(){
#ifndef LOCAL
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#endif
#ifdef LOCAL
	freopen("D:/Administrator/Documents/vscode/in.txt","r",stdin);
	freopen("D:/Administrator/Documents/vscode/out.txt","w",stdout);
#endif
	double a,b;
	cin>>a>>b;
	ll x=0,y=0;
	for(int i=0;i<51;i++){
        y<<=1;
		if(b-1>=0){
			y|=1;
			b-=1;
		}
		b*=2;
	}
    string ans;
    for(int i=0;i<50;i++){
        if(y&1){
            cout<<2;
            ans+='2';
        }else{
            cout<<1;
            ans+='1';
        }
        y>>=1;
    }
	return 0;
}