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- input()
- a = input().split()
- if(a == a[::-1]):
- print(0)
- else:
- n = 0
- for i in range(1, len(a)):
- if(a[i:] == a[:i-1:-1]):
- n = i
- break
- print(n)
- print(*a[n-1::-1], sep=' ')
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