122. Best Time to Buy and Sell Stock II #38
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tokuhirat
reviewed
Aug 7, 2025
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ryosuketc
reviewed
Aug 7, 2025
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| ## 最終コード | ||
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| iを0からprices.size() - 1まで回して、prices[i+1]とprices[i]の差を測るのも考えたが、個人的に未来の価格を見るというのはちょっとだけ直感的に違和感があったのでこちらにした。 |
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未来の価格を見られるとしたら、という観点で株の売買戦略を最適化するというのは、株式の売買モデルを作る文脈だとあるかもしれませんね。少なくとも理論上の最大利益を求められると、一応ベンチマーク (どんなモデルも絶対にそれを超えないという意味で) ができるので、作ったモデルが変な挙動していないかわかるかもしれません。
(大学院の授業で上のようなことをやりましたが、そっち方面の専門家ではないのでどれくらい現実で価値があるのかはわかりませんので遊び程度の話として)
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問題文:
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/description/