N = int(input())
Y = [int(y) for y in input().split()]

Y.sort()
if N % 4 <= 1:
    a = (N-2)//4
    b = a + N//2
else:
    a = N//4
    b = a + N//2

c1 = 0
c2 = 0
c3 = 0
c4 = 0
for y in Y:
    c1 += min(abs(y-Y[a]), abs(y-Y[b]))
    c2 += min(abs(y-Y[a+1]), abs(y-Y[b]))
    if b+1 < N:
        c3 += min(abs(y-Y[a]), abs(y-Y[b+1]))
        c4 += min(abs(y-Y[a+1]), abs(y-Y[b+1]))

ans = min(c1, c2)
if b+1 < N:
    ans = min(ans, c3, c4)
if Y[0] == Y[-1]:
    ans = 1

print(ans)