#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<string>
#include<algorithm>
#include<cmath>
#include<queue>
#include<vector>
#include<stack>
using namespace std;

#define REP(i,n) for(int i=0;(i)<(n);(i)++)
#define ll long long

int main() {
	int N;
	cin >> N;
	
	int mid = 1;
	REP(i, N) {
		mid *= 2;
	}

	mid--;

	cout << (mid / 2) << " ";

	REP(i, mid) {
		if (i + 1 == mid / 2) continue;
		cout << i + 1 << " ";
	}

	cout << endl;
	return 0;
}