#include <bits/stdc++.h>

using i64 = long long;
const double eps = 1e-4;

bool tmp[60];

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    double a, b;
    std::cin >> a >> b;
    double t = 1.0;
    for (int i = 1; i <= 50; ++i) {
        tmp[i] = 0;
    }
    for (int i = 1; i <= 50; ++i) {
        t *= 0.5;
        if (b - t >= 0) {
            tmp[50 - i + 1] = 1;
            b -= t;
        }
    }

    for (int i = 1; i <= 50; ++i) {
        std::cout << ((tmp[i]) ? '2' : '1');
    }
    std::cout << "\n";
    return 0;
}