27 lines
825 B
Python
27 lines
825 B
Python
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from functools import reduce
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def conbine(n, m):
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return reduce(lambda x, y: x // y, range(m, 1, -1),
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reduce(lambda x, y: x * y, range(n, n - m, -1), 1))
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def gen_array(length):
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for i in range(1, length - 1):
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for j in range(1, length - i):
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yield i, j, length - i - j
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def calc(limit):
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total = 0
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for length in range(3, limit + 1):
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for same in range(3, length + 1):
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total += sum(map(lambda x:
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conbine(length - 1 , x[0]) *
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conbine(length - x[0], x[1]) *
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conbine(length - x[0] - x[1], x[2]) *
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(limit - 3) ** (length - same),
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gen_array(same)
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))
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return hex(total).upper()[2:]
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print(calc(16))
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