019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
33 lines
771 B
Python
33 lines
771 B
Python
from random import randint
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from math import floor
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# loop {forwards, backwards, up, down}
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# through a table of values, [[a]].
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def product(xs):
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n = len(xs)
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lhs = [1] * (n + 1)
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for i in range(1, n):
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lhs[i] = lhs[i - 1] * xs[i - 1]
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rhs = [1] * (n + 1)
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for i in range(n - 1, 0, -1):
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rhs[i] = rhs[i + 1] * xs[i]
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result = []
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for i in range(n):
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result.append(lhs[i] * rhs[i + 1])
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return result
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def computed_expected(xs):
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product = 1
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for x in xs:
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product *= x
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return [floor(product / x) for x in xs]
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xs = [randint(1, 10) for _ in range(5)]
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expected = computed_expected(xs)
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result = product(xs)
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print(xs, result, expected)
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assert result == expected
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print("Success!")
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print(product([2, 4, 3, 10, 5]))
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