import statistics
from itertools import accumulate

def main():
    N = int(input())
    Y = list(map(int, input().split()))
    sort_Y = sorted(Y)
    if len(set(Y)) == 1:
        print(1)
        exit()
    elif len(set(Y)) == 2:
        print(0)
        exit()

    A = list(accumulate(sort_Y))
    m = Y[N // 2]
    ans = float('inf')
    first_half = 0
    second_half = 0
    for y in sort_Y:
        second_half += abs(m - y)
    for i in range(N-1):
        m1 = sort_Y[i // 2]
        m2 = sort_Y[(i + N) // 2]

        first_half += sort_Y[i] - m1
        second_half -= m2 - sort_Y[i]

        ans = min(ans, first_half + second_half)

    print(ans)
    

if __name__ == "__main__":
    main()