#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int n;
    cout << "N:";
    cin >> n;

    int a[n];
    for (int i = 0; i < n; i++) {
        a[i] = 0;
    }
    for (int i = 0; i < pow(2, n); i++) {
        for (int j = n-1; j >= 0; j--) {
            cout << a[j];
        }
        cout << endl;
        for (int j = 0; j < n; j++) {
            if (j == 0 || (i+1) % (int)pow(2,j) == 0) {
                if (a[j] == 1) {
                    a[j] = 0;
                } else {
                    a[j] = 1;
                }

            }
        }
    }
}