#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <algorithm>

#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
using namespace std;

const int INF = 0x3f3f3f3f;
const double EPS = 0.000000001;
const double PI = 3.141592653589793;
const long long LLINF = 99999999999999999LL;
const int MAX_N = 100005;
const int MOD = 1000000007;
const long long MAX_VAL = 200000000;

int N;
int v[MAX_N], A[1002][1002];

int main()
{
    /*
    #ifndef ONLINE_JUDGE
        freopen("data.in", "r", stdin);
    #endif
    */

    cin >> N;

    int n = 0;
    for(int i = 1; i <= N; i *= 2)
        v[++n] = i;

    cout << n << "\n";
    for(int i = 1; i <= n; ++i)
        cout << v[i] << " ";

    return 0;
}