#include <fstream>
#include <algorithm>
using namespace std;

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

int n;

int main()
{
    f>>n;
    if(n==1)g<<1<<" "<<1<<'\n'<<1<<'\n'<<1<<'\n';
    else
    {
        g<<n<<" "<<2<<'\n';
        for(int i=1;i<n;++i)
            g<<i<<" "<<i+1<<'\n';
        g<<n<<" "<<1<<'\n';
    }
    return 0;
}