#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

//ifstream f("/home/mihai/Documents/c++/A/A.in");
//ofstream g("/home/mihai/Documents/c++/A/A.out");

ifstream f("lacate.in");
ofstream g("lacate.out");

int main()
{
	int n;
	f >> n;
	g << n - 1 << " " << 1 << "\n";
	for(int i = 1; i < n; i++)
		g << i << "\n";
	g << 1;
}