Description: A student of z-school found a kind of sorting called z-sort. The array a with n elements are z-sorted if two conditions hold: 1. ai ≥ ai - 1 for all even i, 2. ai ≤ ai - 1 for all odd i > 1. For example the arrays [1,2,1,2] and [1,1,1,1] are z-sorted while the array [1,2,3,4] isn’t z-sorted. Can you make the array z-sorted? Input Format: The first line contains a single integer n (1 ≤ n ≤ 1000) — the number of elements in the array a. The second line contains n integers ai (1 ≤ ai ≤ 109) — the elements of the array a. Output Format: If it's possible to make the array a z-sorted print n space separated integers ai — the elements after z-sort. Otherwise print the only word "Impossible". Note: None