#include <bits/stdc++.h>
#define endl '\n'
#define x first
#define y second
#define stop cout << "?" << '\n'
using namespace std;
typedef long long ll;
typedef long double db;
typedef pair<int, int> pii;
const int N = 1e5 + 10, M = 7e5;
const ll mod = 998244353;
const double pi = acos(-1);
db a, b;
vector<db> base;
bool ans[N];
void solve()
{
    cin >> a >> b;
    for (int i = 1; i <= 20; i++)
        cout << "1";
    db st = 0.5;
    for (int i = 1; i <= 25; i++)
    {
        base.push_back(st);
        st /= 2;
    }
    // for (auto i : base)
    //     cout << i << " " << endl;
    for (int i = 0; i < base.size(); i++)
        if (b >= base[i])
            ans[i] = true, b -= base[i];
    for (int i = base.size() - 1; i >= 0; i--)
    {
        if (ans[i])
            cout << "2";
        else
            cout << "1";
    }
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int _ = 1;
    // cin >> _;
    while (_--)
        solve();
    return 0;
}