#include <bits/stdc++.h>
using namespace std;
struct light{
	bool light;
}a[5001];
int n,cnt = 1;
int main(){
	scanf("%d",&n);
	for(int i = 1;i<=n;i++)a[i].light = true;
	for(int i = 1;i<=n;i++){
		if(i%cnt == 0){
			if(a[i].light == true)a[i].light = false;
			else a[i].light = true;
		}
	}
	for(int i = 1;i<=n;i++)
		if(a[i].light == false)printf("%d ",i);
	return 0;
}