#include <iostream>
 
using namespace std;
 
int main()
{
    int n;
    cin>>n;
    if(n == 1){
        cout<<1<<'\n';
        cout<<1;
        return 0;
    }
        cout<<2<<'\n';
        cout<<1<<' ';
        cout<<n - 1;
    return 0;
}