N = int(input())
a = list(map(int,input().split()))
a.sort(reverse = True)

ans = 0
import sys
if N <= 2:
    print(0)
    exit()
Sum = [0] * (N + 1)
for i in range(N):
    Sum[i + 1] = Sum[i] + a[i]
for i in range(1,N - 1):
    mid = a[i]
    k = N - 1 - i
    delta = min(i,k)
    end = delta
    start = 0
    if a[0] - mid < mid - a[i + 1]:
        continue
    while end - start > 1:
        mm = end + start >> 1
        if a[mm] - mid < mid - a[i + mm + 1]:
            end = mm
        else:
            start = mm
    ue = Sum[start + 1]
    sita = Sum[i + start + 1 + 1] - Sum[i + 1]
    tmp = ue - mid * (start + 1) * 2 +  sita
    if tmp > ans:
        ans = tmp
print(ans)