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// Author: Kajetan Ramsza
#include "bits/stdc++.h"

using namespace std;

template<typename F, typename S> ostream& operator<<(ostream& os, const pair<F, S> &p) { return os<<"("<<p.first<<", "<<p.second<<")"; }
template<typename T> ostream &operator<<(ostream & os, const vector<T> &v) { os << "{"; typename vector< T > :: const_iterator it;
    for( it = v.begin(); it != v.end(); it++ ) { if( it != v.begin() ) os << ", "; os << *it; } return os << "}"; }

template < typename T >
ostream &operator << ( ostream & os, const set< T > &v ) {
    os << "[";
    typename set< T > :: const_iterator it;
    for ( it = v.begin(); it != v.end(); it++ ) {
        if( it != v.begin() ) os << ", ";
        os << *it;
    }
    return os << "]";
}

template < typename F, typename S >
ostream &operator << ( ostream & os, const map< F, S > &v ) {
    os << "[";
    typename map< F , S >::const_iterator it;
    for( it = v.begin(); it != v.end(); it++ ) {
        if( it != v.begin() ) os << ", ";
        os << it -> first << " = " << it -> second ;
    }
    return os << "]";
}

void dbg_out() { cerr<<'\n'; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr<<' '<<H; dbg_out(T...); }

#ifdef DEBUG
#define dbg(...) cerr<<"(" << #__VA_ARGS__ <<"):", dbg_out(__VA_ARGS__)
#else
#define dbg(...) 
#endif

typedef long long ll;

int bits(int x) {
	return __builtin_popcount(x);
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int n;
	cin>>n;
	set<int, greater<int>> res;
	int sum = 0;
	int i;
	for(i=1;;i++) {
		dbg(i, bits(i));
		sum += bits(i);
		res.insert(i);
		if(sum >= n) break;
	}
	// dbg(res);
	i--;
	while(sum > n) {
		if(bits(i) <= sum - n) {
			res.erase(i);
			sum -= bits(i);
		}
		i--;
	}
	cout<<res.size()<<'\n';
	for(auto v : res) {
		cout<<v<<' ';
	}
	cout<<'\n';
}