def kek(s):
    for i in range(len(s) // 2):
        if s[i] != s[-1 - i]:
            return(0)
    return(1)

n = int(input())
a = [int(i) for i in input().split()]
for i in range(0, n):
    if kek(a[i:n]):
        print(i)
        if i != 0:
            l = a[:i]
            l = l[::-1]
            print(*l)
        exit()