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#include <iostream>
#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    cin >> n;
    int r = 0;
    int i = 0;
    while (true) {
        i++;
        r += __builtin_popcount(i);
        if (r >= n){
            break;
        }
    }
    vector <int> result;
    while (i > 0) {
        int k = __builtin_popcount(i);
        if (r - k < n) {
            result.push_back(i);
        }
        else {
            r -= k;
        }
        i--;
    }
    cout << result.size() << "\n";
    for (int i = 0; i < result.size(); i++) {
        cout << result[i] << " ";
    }
}