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#include<iostream>
#include<vector>
using namespace std;
typedef long long ll;
ll t[35];
vector<ll>v;
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
	int n,wyz=0,x=1,sum=0;
	cin>>n;
	while(sum<n){
		sum+=__builtin_popcount(x);
		t[__builtin_popcount(x)]=x;
		v.push_back(x);
		x++;
	}
	if(sum>n)wyz=t[sum-n];
	cout<<v.size()-((wyz!=0)?1:0)<<'\n';
	for(int i=v.size()-1;i>=0;i--){
		if(v[i]!=wyz)cout<<v[i]<<' ';
	}
	return 0;
}