Random Pick With Weight - #158
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nodchip
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Aug 12, 2026
| class Solution: | ||
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| def __init__(self, w: list[int]): | ||
| self.cumsum = list(itertools.accumulate(w)) |
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cumsum は numpy の関数名だと思うのですが、ソフトウェアエンジニアの常識に含まれているかどうか微妙に感じます。 cumulative_sum とフルスペルで書いたほうが無難だと思います。
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そうですね、numpy に影響されたと思います。変数名は基本省略しないで書くことを意識します。
（step2 では prefix_sums としました）
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https://leetcode.com/problems/random-pick-with-weight/editorial/