from collections import Counter

def main():
    N = int(input())
    Y = tuple(map(int, input().split()))

    if N == 1:
        print(Y[0])
        return
    elif N == 2:
        print(max(Y) - min(Y))
        return
    else:
        c = Counter(Y)
        dist = float('inf')
        for i in c.keys():
            n = 0
            for j, k in c.items():
                n += abs(i - j) * k
            dist = min(dist, n)

    print(dist)

main()