Untitled
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| Language | Python |
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| Owner | Anonymous |
| Created | 3 years ago |
| Modified | 3 years ago |
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def ans(A):
w = set() # walked
res = 0 # result
for a in A:
c = 0 # count
while a not in w:
w.add(a)
c += 1
a = A[a]
res = max(res, c)
print(res)
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