103. Binary Tree Zigzag Level Order Traversal - #26
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skypenguins
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Jul 20, 2026
| - 他の人も書いているが読みやすい． | ||
| - 計算量についてふれてもいいかもしれない．N<=2000なので，心配するほどではないという捉え方もできる | ||
| - https://github.com/h-masder/Arai60/pull/30 | ||
| - pythonの`[::-1]`とか全然知らなかったな |
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これはスライスですね。
公式ドキュメントは https://docs.python.org/ja/3.13/library/functions.html#slice あたりの認識です。
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返信が遅れました．
教えていただきありがとうございます．
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全体的に読みやすいと思いました。 |
nodchip
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Jul 21, 2026
| layerNum := 0 | ||
| frontier := []*TreeNode{root} | ||
| for len(frontier) > 0 { | ||
| nextLayer := []*TreeNode{} |
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frontier と nextLayer で、同じようなものを格納する変数の変数名に、異なる単語が使われているのが気になりました。自分なら frontier と nextFrontier と名付けると思います。好みの問題かもしれません。
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返信が遅れてすみません
たしかにそう思いました．次からそうします．
| frontier := []*TreeNode{root} | ||
| for len(frontier) > 0 { | ||
| nextLayer := []*TreeNode{} | ||
| sameLayerVals := []int{} |
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https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/