18 lines
338 B
Python
18 lines
338 B
Python
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#!/usr/bin/env python3
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from itertools import product
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peter = [0]*(4*9 + 1)
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colin = [0]*(6*6 + 1)
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for p in product([1,2,3,4], repeat=9):
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peter[sum(p)] += 1
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for p in product([1,2,3,4,5,6], repeat=6):
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colin[sum(p)] += 1
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c = 0.0
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for i, p in enumerate(peter):
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c += p * sum(colin[:i])
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print("{0:.7f}".format(c/(6**6 * 4**9)))
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