#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <string>
#include <cstring>
#include <cmath>
#include <cctype>
#include <algorithm>
#include <sstream>
#include <iomanip>
#include <climits>

#include <vector>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <bitset>
#include <iterator>

using namespace std;

typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;

#define INF 1e9
#define ll long long
#define ull unsigned long long

int main()
{
   // freopen("C:\\Users\\Sonia\\Documents\\mindCoding.ro\\2015.03.25\\in.txt", "r", stdin);
    int n, s = 20;
    scanf("%d", &n);
    printf("%d\n", s);
    printf("1 ");
    int num = 1;
    for(int i = 0; i < s-2; i++)
    {
        num *= 2;
        printf("%d ", num);
    }
    num *= 2;
    printf("%d\n", num);

    return 0;
}