def main():
    n = int(input())
    A = list(map(int, input().split()))
    A.sort()

    x = A[0]
    if all([i == x for i in A]):
        print(1)
        return

    m = A[n // 2]
    min_sum = 4783483 # 意味のない数字
    sum1 = 0
    sum2 = sum([abs(m - i) for i in A])
    for i in range(0, n - 1):
        m1 = A[i // 2]
        m2 = A[(i + 1 + n - 1) // 2]

        sum1 += A[i] - m1
        sum2 -= m2 - A[i]

        if i == 0:
            min_sum = sum1 + sum2
        else:
            min_sum = min(min_sum, sum1 + sum2)

    print(min_sum)

if __name__ == '__main__':
    main()