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Fix code review issues and SRI hashes for LeetCode 2625 solution #256

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myoshi2891 merged 2 commits into from
Feb 8, 2026
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Fix code review issues and SRI hashes for LeetCode 2625 solution #256

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5aabde3
Fix code review issues and SRI hashes for LeetCode 2625 solution
myoshi2891 Feb 8, 2026
daf03ee
Fix complexity docs and pin library versions with SRI hashes
myoshi2891 Feb 8, 2026
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18 changes: 6 additions & 12 deletions ...ten Deeply Nested Array/Claude Code Sonnet 4.5 extended/FlattenDeeplyNestedArray_TS.ipynb
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Expand Up @@ -30,7 +30,7 @@
"|---------|----------|-----------|------------|---------|-------|-----|\n",
"| 再帰的展開 | O(N) | O(N + D) | 低 | 高 | 高 | N=全要素数、D=深さ。最も直感的 |\n",
"| スタック反復 | O(N) | O(N + D) | 中 | 高 | 中 | スタックオーバーフロー回避可能 |\n",
"| reduce連鎖 | O(N) | O(N + D) | 中 | 中 | 中 | 関数型スタイル、やや複雑 |\n",
"| reduce連鎖 | O(N²) | O(N + D) | 中 | 中 | 中 | 関数型スタイル、やや複雑 |\n",
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"\n",
"## 3. 選択したアルゴリズムと理由\n",
"\n",
Expand Down Expand Up @@ -63,7 +63,7 @@
" * @param arr - 平坦化する多次元配列\n",
" * @param n - 平坦化する深さ（0の場合は平坦化しない）\n",
" * @returns 平坦化された配列\n",
" * @complexity Time: O(N), Space: O(N + D) - N:全要素数, D:深さ\n",
" * @complexity Time: O(N²), Space: O(N + D) - N:全要素数, D:深さ\n",
" */\n",
"var flat = function (arr: MultiDimensionalArray, n: number): MultiDimensionalArray {\n",
" // n = 0 の場合は平坦化不要\n",
Expand Down Expand Up @@ -98,7 +98,7 @@
"\n",
"/**\n",
" * reduceを使った関数型スタイルの実装\n",
" * @complexity Time: O(N), Space: O(N + D)\n",
" * @complexity Time: O(N²), Space: O(N + D)\n",
" */\n",
"var flatReduce = function (arr: MultiDimensionalArray, n: number): MultiDimensionalArray {\n",
" if (n === 0) return arr;\n",
Expand All @@ -123,7 +123,7 @@
"\n",
"/**\n",
" * 反復的なスタックベース実装（大規模データ対応）\n",
" * @complexity Time: O(N), Space: O(N + D)\n",
" * @complexity Time: O(N²), Space: O(N + D)\n",

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⚠️ Potential issue | 🟠 Major

スタック反復版の計算量が誤って O(N²) に変更されています。

flatIterative は各要素をスタックから1回ポップし、result.push(item) で O(1) 追加するだけなので、時間計算量は O(N) です。スプレッドや concat() は使用していません。HTML の比較表（スタック反復版: O(N)）とも矛盾しています。

📝 修正案 
-                " * `@complexity` Time: O(N²), Space: O(N + D)\n",
+                " * `@complexity` Time: O(N), Space: O(N + D)\n",
🤖 Prompt for AI Agents 
In `@JavaScript/2625`. Flatten Deeply Nested Array/Claude Code Sonnet 4.5
extended/FlattenDeeplyNestedArray_TS.ipynb at line 126, Update the complexity
annotation for the stack-iteration implementation: change the documented time
complexity in the comment/string that currently reads "Time: O(N²), Space: O(N +
D)" to "Time: O(N), Space: O(N + D)" for the flatIterative implementation, since
flatIterative pops each element once and pushes to result in O(1) per item;
ensure the change references the flatIterative identifier so the doc stays
consistent with the HTML comparison table.

" */\n",
"var flatIterative = function (arr: MultiDimensionalArray, n: number): MultiDimensionalArray {\n",
" const result: MultiDimensionalArray = [];\n",
Expand Down Expand Up @@ -175,7 +175,7 @@
"### パフォーマンス考察\n",
"\n",
"- **再帰呼び出しコスト**: 現代のJSエンジンは末尾再帰最適化を持たないが、制約範囲（depth ≤ 1000）では問題なし\n",
"- **配列操作**: `push(...array)` は一度に複数要素を追加するため、ループより効率的\n",
"- **配列操作**: `push(...array)` はスプレッド展開により内部で配列を反復・割り当てするため、ホットパスでは明示的なループより遅い場合がある（本実装では `push(...flattened)` を要素ごとの `push` に変更することで156ms→80msに改善）\n",
"- **メモリ**: 結果配列は避けられないO(N)。コールスタックはO(D)で十分小さい"
]
},
Expand Down Expand Up @@ -522,12 +522,6 @@
"| スタック初期化 | `[[arr, 0]]` | `arr` の各要素を個別に `[arr[i], 0]` として追加 |\n",
"| depth判定 | `if (depth < n)` のみ | `if (Array.isArray(item) && depth < n)` |\n"
]
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Expand All @@ -545,4 +539,4 @@
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"nbformat_minor": 5
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}
75 changes: 57 additions & 18 deletions ...cript/2625. Flatten Deeply Nested Array/Claude Code Sonnet 4.5 extended/README_react.html
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Expand Up @@ -20,25 +20,40 @@
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Expand Down Expand Up @@ -773,7 +788,7 @@ <h4 class="font-bold text-slate-800 mb-2">4. エッジケース</h4>
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Expand Down Expand Up @@ -1095,12 +1110,36 @@ <h4 class="font-bold text-orange-900 mb-2">💡 最適化の考察</h4>
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Expand Down Expand Up @@ -1397,7 +1436,7 @@ <h4 class="font-bold text-orange-900 mb-2">💡 最適化の考察</h4>
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Expand Down Expand Up @@ -1513,7 +1552,7 @@ <h4 class="font-bold text-orange-900 mb-2">💡 最適化の考察</h4>
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Expand Down Expand Up @@ -1878,7 +1917,7 @@ <h4 class="font-bold text-orange-900 mb-2">💡 最適化の考察</h4>
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