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#include<bits/stdc++.h>
using namespace std;
using ll=long long;
int n;
vector<int>t;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	cin>>n;
	int s=0;
	int i=0;
	for(i=1;;++i){
		s+=__builtin_popcount(i);
		if(s>=n)
			break;
	}

	for(;i>=1;--i){
		if(s-__builtin_popcount(i)>=n)
			s-=__builtin_popcount(i);
		else
			t.push_back(i);
	}
	cout<<t.size()<<'\n';
	for(i=0;i<t.size();++i)
		cout<<t[i]<<' ';
}