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11 lines
272 B
Plaintext
11 lines
272 B
Plaintext
def count(n):
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if (n & 1):
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return 0
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val = n // 2
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dy_lst = [1 for i in range(val + 1)]
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for i in range(2, val + 1):
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dy_lst[i] = 0
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for j in range(i):
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dy_lst[i] += (dy_lst[j] * dy_lst[i - j - 1])
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return dy_lst[val]
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