//Problem

//Arrange Numbers in Array

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//Given a number n, put all elements from 1 to n in an

//array in order - 1,3,.......4,2.

//Input Format :

// Integer n

//Output Format :

// Elements of the array separated by space.

//Sample Input 1 :

//6

//Sample Output 1 :

// 1 3 5 6 4 2

//Sample Input 2 :

//9

//Sample Output 2 :

// 1 3 5 7 9 8 6 4 2

import java.util.Scanner;

public class array {

public static void main(String[] args){

// TODO Auto-generated method stub

Scanner sc=new Scanner (System.in);

int n = sc.nextInt();

int[] arr=new int[n];

int i=0,j=n-1;

int num =1;

while(i<j)

{

arr[i]=num;

i++;

num++;

arr[j]=num;

num++;

j--;

}

if(i==j)

{

arr[i]=num;

}

for (int x=0;x<arr.length;x++)

{

System.out.print(arr[x] + " ");

}

}

}