Create 111. Minimum Depth of Binary Tree.md#11
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sakupan102
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May 9, 2024
sakupan102
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May 9, 2024
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この条件がTrueになるのは与えられたTreeがNoneの場合だけですよね。
個人的にはNoneの場合の処理は再帰の外に出しちゃって、再帰の引数にはNoneが含まれないようにしてもよいかと思いました。
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ありがとうございます。内部に再帰用のhelper関数を作成して、if not rootはその外側というイメージであっていますか？
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ありがとうございます。特に引数を増やす必要がなければ、再帰用に関数を作成しない方が良いと勝手に思っていました。
Stackを利用したDFSを追記
oda
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May 11, 2024
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ついでだから枝切りしてみます?
つまり、depth >= min_depth だったらそれ以上再帰する必要ないですよね。
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ありがとうございます！確かに不要ですね。
枝刈りの処理を追記しました。
stackを利用した解法に枝刈りを追記
TORUS0818
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Jul 15, 2024
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Mike0121
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https://leetcode.com/problems/minimum-depth-of-binary-tree/