from math import sqrt,sin,cos,tan,ceil,radians,floor,gcd,exp,log,log10,log2,factorial,fsum
from heapq import heapify, heappop, heappush
from bisect import bisect_left, bisect_right
from copy import deepcopy
import copy
import random
from random import randrange
from collections import deque,Counter,defaultdict
from itertools import permutations,combinations
from decimal import Decimal,ROUND_HALF_UP
#tmp = Decimal(mid).quantize(Decimal('0'), rounding=ROUND_HALF_UP)
from functools import lru_cache, reduce
#@lru_cache(maxsize=None)
from operator import add,sub,mul,xor,and_,or_,itemgetter
import sys
input = sys.stdin.readline
# .rstrip()
INF = 10**18
mod1 = 10**9+7
mod2 = 998244353

#DecimalならPython
#再帰ならPython!!!!!!!!!!!!!!!!!!!!!!!!!!


'''
二分探索の可能性はある
ソートしていい感じにやりたいけど
動かさないといけないので、厄介
動かすか、他を動かしてくるかという
貪欲でいけるんかな
いけそう
'''

N = int(input())
Y = list(map(int, input().split()))

Y.sort()

f = 0
ans = 0
for i in range(N):
    if f == 0:
        ans += abs(Y[i+1]-Y[i])
        f = 1
    elif f == 1:
        f = 2
    else:
        if i == N-1:
            ans += abs(Y[i]-Y[i-1])
            break
        if i == N-2:
            ans += abs(Y[i+1]-Y[i])
            break
        
        if Y[i]-Y[i-1] < Y[i+1]-Y[i]:
            ans += abs(Y[i]-Y[i-1])
            f = 0
        else:
            ans += abs(Y[i+1]-Y[i])
            f = 1

print(ans)