def dist(Y,a,b):
    X=0
    for y in Y:
        X+=min(abs(y-a),abs(y-b))
    return X

def solve(Y):
    if min(Y)==max(Y):
        return 1

    Y.sort()

    p=N//3
    q=(N//3)*2
    A=float("inf")

    for a in range(max(p-5,0),min(p+5,N)):
        for b in range(max(q-5,0),min(q+5,N)):
            A=min(A,dist(Y,Y[a],Y[b]))
    return A

N=int(input())
Y=list(map(int,input().split()))
print(solve(Y))