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

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

plus = []
minus = []
for a in A:
    if 0 <= a:
        plus.append(a)
    else:
        minus.append(a)
plus.sort()
minus.sort()

B = None
if len(minus) == 0:
    B = plus[:]
elif len(minus) == 1:
    B = minus[:]+plus[:]
else:
    a, b = minus[:]+plus[:], [minus[0]]+minus[2:]+plus[:]+[minus[1]]
    if sum(func(a[i], a[i+1]) for i in range(N-1)) <= sum(func(b[i], b[i+1]) for i in range(N-1)):
        B = a[:]
    else:
        B = b[:]

print(sum(func(B[i], B[i+1]) for i in range(N-1)))