#include<bits/stdc++.h>
using namespace std;
int a[3005],book[100005];
int main()
{
	int n;
	cin>>n;
	a[1]=1;
	for(int i=2;i<=n;i++)
	{
		
		if(a[i-1]-i>0&&book[a[i-1]-i]==0)
		{
			a[i]=a[i-1]-i;
			book[a[i-1]-i]=1;
		}
		else
		{
			a[i]=a[i-1]+i;		
			book[a[i]]=1;
		}
	}
	sort(a+1,a+n+1);
	for(int i=1;i<=n;i++)
	{
		cout<<a[i]<<' ';
	}
	return 0;
 }