#include <bits/stdc++.h>

using namespace std;

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

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


    return 0;
}