// smhmh
#include <iostream>
#include <vector>

using namespace std;
 
unsigned int countSetBits (unsigned int n)  {
    unsigned int count = 0;
    while (n) {
        count += n & 1;
        n >>= 1;
    }
    
    return count;
}
 
int main () {
    ios::sync_with_stdio (0);
    cin.tie (0);
    
    int n;
    cin >> n;
    
    int last, diff;
    for (int i = 0, bits = 0; i <= n; i++) {
        bits += countSetBits (i);
        if (bits >= n) {
            last = i;
            diff = bits - n;
            break;
        }
    }
    
    vector<int> V;
    
    for (int i = last; i > 0; i--) {
        if (diff >= countSetBits(i))
            diff -= countSetBits(i);
        else
            V.push_back(i);
    }
    
    cout << V.size() << '\n';
    for (auto v : V)
        cout << v << ' ';
}