#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
#define vv(a,b,c,d) vector<vector<a> >(b,vector<a>(c,d))
#define vvv(a,b,c,d,e) vector<vector<vector<a> > >(b,vv(a,c,d,e))
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);
    const int M = 250;
    int K;
    cin >> K;
    for(int a=0;a<=M;++a)
        for(int b=0;a+b<=M;++b)
            for (int c = 1; a + b + c <= M; ++c) {
                if ((K - a*b) % c == 0) {
                    int d = (K - a*b) / c;
                    if (a + b + c + d <= M) {
                        vi re;
                        rep(i, a)re.push_back(2);
                        rep(i, b)re.push_back(3);
                        rep(i, c)re.push_back(6);
                        rep(i, d)re.push_back(23);
                        cout << sz(re) << endl;
                        each(r, re)cout << r << ' ';
                        cout << endl;
                        exit(0);
                    }
                }
            }
}