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


int bits(int n) {
    int w = 0;
    for(int i=0; i<sizeof(int)*8; i++) {
        if(n & (1 << i)) w++;
    }
    return w;
}

const int roz = 213769;
bool isTaken[roz];


int main() {

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, length=0, bitCount=0, i=1;
    cin >> n;

    while(bitCount < n) {
        length++;
        isTaken[i] = true;
        bitCount += bits(i++);
    }
    while(bitCount != n) {
        if(bits(--i) <= bitCount - n) {
            isTaken[i] = false;
            length--;
            bitCount -= bits(i);
        }
    }

    cout << length << "\n";
    for(i=roz-1; i>0; i--) {
        if(isTaken[i]) cout << i << ' ';
    }

    return 0;
}