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Create Non-crossing-lines-to-connect-points-in-a-circle

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A Safari 2018-11-28 15:54:19 -05:00 committed by GitHub
parent 6a95bf9ad8
commit 98db791d37
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def count(n):
if (n & 1):
return 0
val = n // 2
dy_lst = [1 for i in range(val + 1)]
for i in range(2, val + 1):
dy_lst[i] = 0
for j in range(i):
dy_lst[i] += (dy_lst[j] * dy_lst[i - j - 1])
return dy_lst[val]