import sys
input = sys.stdin.readline


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

A.sort()

def calc(x,y):
    if x<0 and y<0:
        return -x-y
    else:
        return abs(x-y)

def calc2(A):
    score=0
    for i in range(N-1):
        x,y=A[i],A[i+1]
        score+=calc(x,y)

    return score

MIN=calc2(A)
ind=A[:]

MINUS=[]
OTHER=[]

for a in A:
    if a<0:
        MINUS.append(a)
    else:
        OTHER.append(a)

B=[-1]*len(OTHER)

f=0
l=len(B)-1

for i in range(len(OTHER)):
    if i%2==0:
        B[f]=OTHER[i]
        f+=1
    else:
        B[l]=OTHER[i]
        l-=1

B=[MINUS[0]]+B+MINUS[1:][::-1]
score2=calc2(B)

if score2<MIN:
    MIN=score2
    ind=B[:]

print(MIN)