#define  _CRT_SECURE_NO_WARNiINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream>
#include <random>
#include <map>
#include <fstream>
#include <iomanip>
#include <time.h>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <cassert>
#include <set>
using namespace std;
#define eps 0.000000001
#define LONG_INF 10000000000000000
#define GOLD 1.61803398874989484820458
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
#define cycle_per_sec 2806192512
int main() {
	long long k;
	cin >> k;
	if (k == 0) {
		cout << 1 << endl;
		cout << 1 << endl;
		return 0;
	}
	for (int i = 1; i <= 250; ++i) {
		long long remaining = k - (i * (i - 1LL) / 2LL);
		for (int q = 1; q <= remaining / i; ++q) {
			long long moto = remaining - i * q;
			if (moto % q == 0&&(i+q+moto/q) <= 250) {
				vector<int> ans;
				REP(t, i) {
					ans.push_back(1);
				}
				REP(t, q) {
					ans.push_back(4);
				}
				REP(t, moto / q) {
					ans.push_back(7);
				}
				if (ans.size() <= 250) {
					cout << ans.size() << endl;
					REP(i, ans.size())cout << ans[i] << " ";
					cout << endl;
					return 0;
				}
			}
		}
	}
}