package main

import "fmt"

func main() {
	var K int
	fmt.Scan(&K)
	n := make([]int, K)
	var a, b int
	b = K - 1
	for i := 1; i <= K; i++ {
		if i%2 == 1 {
			n[a] = i
			a++
		} else {
			n[b] = i
			b--
		}
	}
	for i := 0; i < K; i++ {
		fmt.Print(n[i])
		if i == K-1 {
			fmt.Println("")
		} else {
			fmt.Print(" ")
		}
	}
}