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Add LeetCode 102 Binary Tree Level Order Traversal solutions#328

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myoshi2891 merged 5 commits into
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dev-from-macmini
Apr 11, 2026
Merged

Add LeetCode 102 Binary Tree Level Order Traversal solutions#328
myoshi2891 merged 5 commits into
mainfrom
dev-from-macmini

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@myoshi2891

@myoshi2891 myoshi2891 commented Apr 11, 2026

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主に LeetCode 102. Binary Tree Level Order Traversal
の実装追加と、その後の品質・パフォーマンス改善、およびドキュメントの標準化です。

主な内容は以下の通りです:

  1. 新規実装の追加 (2d504a5)
  • Python, TypeScript, Rust の 3 言語による解答コードを追加しました。
  1. Python 実装のバグ修正とドキュメント追加 (e868f02)
  • Python版の修正: ノードの値が 0 の場合に、or トリック(val or extend(...))が原因で値が正しく追加されず None が混入するバグを修正しました(vals.append(node.val)
    に変更)。
  • ドキュメント追加: README.md および README_react.html(ReactベースのUIドキュメント)を新規作成しました。
  1. TypeScript 実装の最適化と構造再編 (2ffb28f)
  • TS版のパフォーマンス改善: Array.prototype.shift()($O(n)$ 操作)をループ内で使用していたため全体の計算量が $O(n^2)$ になっていた問題を、head
    インデックスを用いたポインタ管理方式に変更することで、真の $O(n)$ に改善しました。
  • ドキュメントの標準化: プロジェクト規定(Gemini.md)に基づき、README.md と TypeScript.md を以下の 5セクション構成 に再編し、目次とアンカーリンクを整備しました。
    1. Overview(概要・制約)
    2. Algorithm(TL;DR・図解・正しさのスケッチ)
    3. Complexity(時間/空間計算量)
    4. Implementation(実装コード・検証観点)
    5. Optimization(最適化ポイント・FAQ)

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@coderabbitai

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 81027158-ef35-43b1-9ed1-d577f80ca13c

📥 Commits

Reviewing files that changed from the base of the PR and between 3e0ca80 and abc2a16.

📒 Files selected for processing (2)
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/Binary_Tree_Level_Order_Traversal_Typescript.md
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/README.md

📝 Walkthrough

Summary by CodeRabbit

リリースノート

  • New Features

    • Binary Tree Level Order Traversal(LeetCode 102)のインタラクティブなステップバイステップ学習ページを追加しました。キューを使用したレベルオーダートラバーサルのアルゴリズムを視覚化で説明します。
  • Documentation

    • Python、Rust、TypeScriptの3言語で完全な解説ドキュメントを追加しました。実装例、計算量分析、エッジケース検証を含みます。
  • Chores

    • インデックスページを更新し、新しいレッスンを反映しました。

Walkthrough

LeetCode 102「バイナリツリーレベル順序走査」の解説ドキュメントをPython/Rust/TypeScriptで追加し、READMEや対話式HTML(React/Babel、Mermaid、Prism)を新規追加。.gitignore.claude/skillsを追加し、サイトインデックス(レッスン数)と公開HTMLを更新。

Changes

コホート / ファイル(s) 概要
バージョン管理設定
\.gitignore
.claude/skills を ignore に追加。
LeetCode 102 言語別ソリューション
Algorithm/BinaryTree/.../102. Binary Tree Level Order Traversal/Binary_Tree_Level_Order_Traversal_Python.md, ..._Rust.md, ..._Typescript.md
Python/Rust/TypeScript 各言語の BFS(レベル順)解説と実装例を追加。実装上の注意(level_size 固定、0 値の取り扱い、効率的なキュー実装等)を記載。
LeetCode 102 ドキュメンテーション
Algorithm/BinaryTree/.../102. Binary Tree Level Order Traversal/README.md
問題解説、Mermaid フローチャート、アルゴリズム説明、計算量、エッジケース、完全な Python 実装を含むドキュメントを追加。
対話式/公開 HTML
Algorithm/BinaryTree/.../102. Binary Tree Level Order Traversal/README_react.html, public/Algorithm/BinaryTree/.../102. Binary Tree Level Order Traversal/README_react.html
日本語の静的/対話式ページを追加。Babel 経由の React ステップ実行、Mermaid によるフローチャート描画、SVG ツリー可視化、Prism ハイライトを実装(静的ファイル追加)。
サイトインデックス更新
public/index.html
掲載カードに「LeetCode 102 · Binary Tree Level Order Traversal」を追加。総レッスン数を168→169、Algorithm タブを90→91に更新。生成日を2026-04-11に更新。

Sequence Diagram(s)

sequenceDiagram
    participant User as "User"
    participant Browser as "Browser(JS)"
    participant React as "React Stepper\n(state & UI)"
    participant Mermaid as "Mermaid Renderer"
    participant Prism as "Prism Highlighter"

    User->>Browser: 開始 (ページ読み込み)
    Browser->>Mermaid: mermaid.render() を呼び出し
    Mermaid-->>Browser: SVG フローチャートを返す
    Browser->>React: スクリプト初期化 (Babel 実行)
    React-->>Browser: 初期 UI を描画 (ツリー/キュー/結果)
    User->>React: Next/Play を操作
    React->>Browser: 状態更新 → DOM を更新 (キュー/ハイライト)
    Browser->>Prism: コードブロックのハイライト実行
    Prism-->>Browser: ハイライト済みコードを返す
    Browser-->>User: 更新された可視化を表示
Loading

推定コードレビュー時間

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 新しい根元に跳ねて
レベルごとに値を集めるよ
Python、Rust、TypeScript の声で
対話式のページが光る夜に
169 の扉、また一つ開く

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name Status Explanation Resolution
Description check ❓ Inconclusive No pull request description was provided by the author, so assessment cannot be made based on content. Consider adding a description to explain the purpose and context of the LeetCode 102 solutions being added.
✅ Passed checks (2 passed)
Check name Status Explanation
Title check ✅ Passed The title accurately describes the main change: adding LeetCode 102 Binary Tree Level Order Traversal solutions across multiple programming languages.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.


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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@Algorithm/BinaryTree/claude` sonnet 4.6 extended/102. Binary Tree Level Order
Traversal/Binary_Tree_Level_Order_Traversal_Typescript.md:
- Around line 62-67: The table claims BFS is O(n) but the implementation uses
array.shift(), which makes the BFS O(n²); update the BFS implementations that
call queue.shift() to use a head-index (or explicit deque) pattern instead:
replace popping with incrementing a head pointer (e.g., let head = 0; while
(head < queue.length) { const node = queue[head++]; ... queue.push(child); }) in
the BFS function(s) so enqueues remain O(1) and overall traversal is O(n); apply
the same change to the other occurrences that use queue.shift().

In `@Algorithm/BinaryTree/claude` sonnet 4.6 extended/102. Binary Tree Level Order
Traversal/README.md:
- Around line 5-16: The README uses multiple headings but must be reorganized
into the mandated five-section structure: create top-level sections named
Overview, Algorithm, Complexity, Implementation, and Optimization and move/merge
existing headings accordingly—put "概要" under Overview; combine "アルゴリズム要点 TL;DR",
"図解", and "正しさのスケッチ" under Algorithm; put "計算量" under Complexity; move "Python
実装" and "エッジケースと検証観点" under Implementation; and place "CPython 最適化ポイント" and
"FAQ" under Optimization. Update the Table of Contents to list only these five
sections and apply the same refactor to the other README files flagged in the
comment.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: b015354c-1a04-4d6c-8484-01ce086fc8f4

📥 Commits

Reviewing files that changed from the base of the PR and between 81952ab and 3e0ca80.

📒 Files selected for processing (8)
  • .gitignore
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/Binary_Tree_Level_Order_Traversal_Python.md
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/Binary_Tree_Level_Order_Traversal_Rust.md
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/Binary_Tree_Level_Order_Traversal_Typescript.md
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/README.md
  • Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/README_react.html
  • public/Algorithm/BinaryTree/claude sonnet 4.6 extended/102. Binary Tree Level Order Traversal/README_react.html
  • public/index.html

@myoshi2891 myoshi2891 changed the title Dev from macmini Add LeetCode 102 Binary Tree Level Order Traversal solutions Apr 11, 2026
@myoshi2891 myoshi2891 merged commit c8cbe13 into main Apr 11, 2026
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@coderabbitai coderabbitai Bot mentioned this pull request May 8, 2026
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