N=int(input())
A=list(map(int,input().split()))
A.sort()
def score(A):
    ans=0
    for i in range(N-1):
        x,y = A[i],A[i+1]
        if x<0 and y<0:
            ans += -x - y
        else:
            ans += abs(x-y)
    return ans
score1 = score(A)
score2 = score(A[1:]+[A[0]])
print(min(score1,score2))