//  Gray Code

#include<bits/stdc++.h>

using namespace std;

vector<string> gray_code(int size, bool print) {
    if (size == 1) {
        if (print) {
            cout << "0" << '\n' << "1" << endl;
        }
        return {"0", "1"};
    }
    auto prev_gray_code = gray_code(size - 1, false);
    vector<string> output;
    for (auto &s: prev_gray_code) {
        if (print) cout << "0"+s << endl;
        output.push_back("0"+s);
    }
    std::reverse(prev_gray_code.begin(), prev_gray_code.end());
    for (auto &s: prev_gray_code) {
        if (print) cout << "1"+s << endl;
        output.push_back("1"+s);
    }
    return output;
}

int main() {
    int n; cin >> n;
    gray_code(n, true);
    return 0;
}