#include <bits/stdc++.h>

using f80 = long double;

int main() {
    f80 a, b;
    std::cin >> a >> b;

    std::string ans;
    for (int i = 0; i < 20; ++i) {
        ans += '1';
    }

    const int B = 25;
    std::vector<f80> base(B);
    std::vector<uint8_t> has(B);
    for (int i = B - 1; i >= 0; --i) {
        if (i == B - 1) base[i] = 0.5;
        else base[i] = base[i + 1] * 0.5;
    }

    for (int i = B - 1; i >= 0; --i) {
        if (b >= base[i]) {
            b -= base[i];
            has[i] = true;
        }
    }

    for (int i = 0; i < B; ++i) {
        if (has[i]) ans += '2';
        else ans += '1';
    }

    std::cout << ans << '\n';
}