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Hello アルゴリズム
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Hello アルゴリズム
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<span style="left: 52.244%; top: 20.919%;">
アルゴリズム入門
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配列と連結リスト
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スタックとキュー
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ハッシュテーブル
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木
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ヒープ
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グラフ
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ソート
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分割統治法
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バックトラッキング
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動的計画法
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貪欲法
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<p style="margin-top: max(-1vh, -2vw); margin-bottom: min(2vh, 3.5vw);">
アニメーション解説とワンクリック実行ができるデータ構造とアルゴリズムのチュートリアル
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読み始める
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コードリポジトリ
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<p style="margin-top: 2em;">
500 枚のアニメーション図解、14 類のプログラミング言語のコード、3000 件のコミュニティQ&amp;Aで，データ構造とアルゴリズムをすばやく習得しよう
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紙の書籍を入手
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オンラインで読む
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PDF をダウンロード
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<h3 style="text-align: center; margin: 1em auto;">
推薦文
</h3>
<div class="intro-container" style="margin: 0 auto;">
<div class="intro-text endor-text">
<p style="margin-bottom: 0;">
「わかりやすいデータ構造とアルゴリズムの入門書で、読者が手と頭を使って学べるよう導いてくれます。アルゴリズム初心者に強くおすすめします。」
</p>
<p style="font-weight: bold;">
—— 邓俊辉，清華大学コンピュータ系教授
</p>
</div>
<div class="intro-text endor-text">
<p style="margin-bottom: 0;">
「もし私が当時データ構造とアルゴリズムを学んでいたときに『Hello アルゴリズム』があったなら、学習は10倍も簡単だったはずだ！」
</p>
<p style="font-weight: bold;">
—— 李沐，アマゾンのシニアプリンシパルサイエンティスト
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</div>
</div>
</div>
</section>
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<h3 style="margin-left: 0.5em;">
アニメーション図解
</h3>
</div>
<p style="margin: 0;">
内容は明快で理解しやすく、学習曲線は緩やか
</p>
<p class="intro-quote">
"A picture is worth a thousand words."
<br/>
「一枚の絵は千の言葉に値する」
</p>
</div>
</div>
<img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
</div>
<div class="intro-container">
<img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
<div class="intro-text">
<div>
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<h3 style="margin-left: 0.5em;">
ワンクリック実行
</h3>
</div>
<p style="margin: 0;">
10種類以上のプログラミング言語で、コードを可視化して実行
</p>
<p class="intro-quote">
"Talk is cheap. Show me the code."
<br/>
「口で言うよりコードを見せよ」
</p>
</div>
</div>
</div>
<div class="intro-container">
<div class="intro-text">
<div>
<div style="display: flex; align-items: center;">
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<h3 style="margin-left: 0.5em;">
相互学習
</h3>
</div>
<p style="margin: 0;">
議論や質問を歓迎し、読者同士でともに前進
</p>
<p class="intro-quote">
"Learning by teaching."
<br/>
「教えることで学ぶ」
</p>
</div>
</div>
<img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
</div>
</div>
</section>
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<div style="margin: 2em auto;">
<h3>
著者
</h3>
<div class="profile-div">
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<a href="https://github.com/krahets">
<img alt="Author: yudongjin" class="profile-img" src="../assets/avatar/avatar_yudongjin.jpg"/>
<br/>
<b>
靳宇栋（@krahets）
</b>
</a>
</div>
</div>
</div>
<div style="margin: 2em auto;">
<h3>
コードレビュー担当者
</h3>
<div class="profile-div">
<div class="profile-cell">
<a href="https://github.com/coderonion">
<img alt="Reviewer: coderonion" class="profile-img" src="../assets/avatar/avatar_coderonion.jpg"/>
<br/>
<b>
coderonion
</b>
<br/>
<sub>
Zig, Rust
</sub>
</a>
</div>
<div class="profile-cell">
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<b>
curtishd
</b>
<br/>
<sub>
Kotlin
</sub>
</a>
</div>
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<b>
Gonglja
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<br/>
<sub>
C, C++
</sub>
</a>
</div>
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<img alt="Reviewer: gvenusleo" class="profile-img" src="../assets/avatar/avatar_gvenusleo.jpg"/>
<br/>
<b>
gvenusleo
</b>
<br/>
<sub>
Dart
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/hpstory">
<img alt="Reviewer: hpstory" class="profile-img" src="../assets/avatar/avatar_hpstory.jpg"/>
<br/>
<b>
hpstory
</b>
<br/>
<sub>
C#
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/justin-tse">
<img alt="Reviewer: justin-tse" class="profile-img" src="../assets/avatar/avatar_justin-tse.jpg"/>
<br/>
<b>
justin-tse
</b>
<br/>
<sub>
JS, TS
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/khoaxuantu">
<img alt="Reviewer: khoaxuantu" class="profile-img" src="../assets/avatar/avatar_khoaxuantu.jpg"/>
<br/>
<b>
khoaxuantu
</b>
<br/>
<sub>
Ruby
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/krahets">
<img alt="Reviewer: krahets" class="profile-img" src="../assets/avatar/avatar_krahets.jpg"/>
<br/>
<b>
krahets
</b>
<br/>
<sub>
Python, Java
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/night-cruise">
<img alt="Reviewer: night-cruise" class="profile-img" src="../assets/avatar/avatar_night-cruise.jpg"/>
<br/>
<b>
night-cruise
</b>
<br/>
<sub>
Rust
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/nuomi1">
<img alt="Reviewer: nuomi1" class="profile-img" src="../assets/avatar/avatar_nuomi1.jpg"/>
<br/>
<b>
nuomi1
</b>
<br/>
<sub>
Swift
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/Reanon">
<img alt="Reviewer: Reanon" class="profile-img" src="../assets/avatar/avatar_Reanon.jpg"/>
<br/>
<b>
Reanon
</b>
<br/>
<sub>
Go, C
</sub>
</a>
</div>
<div class="profile-cell">
<a href="https://github.com/rongyi">
<img alt="Reviewer: rongyi" class="profile-img" src="../assets/avatar/avatar_rongyi.jpg"/>
<br/>
<b>
rongyi
</b>
<br/>
<sub>
Rust
</sub>
</a>
</div>
</div>
</div>
<div style="margin: 2em auto;">
<h3>
日本語版審閱者
</h3>
<div class="profile-div">
<div class="profile-cell">
<a href="https://github.com/eltociear">
<img alt="Reviewer: eltociear" class="profile-img" src="../assets/avatar/avatar_eltociear.jpg"/>
<br/>
<b>
eltociear
</b>
</a>
</div>
</div>
</div>
<div style="margin: 2em auto;">
<h3>
貢献者
</h3>
<p>
本書はオープンソースコミュニティの200名を超える貢献者の皆さんの共同の努力によって継続的に改善されています。時間と労力に感謝します！
</p>
<a href="https://github.com/krahets/hello-algo/graphs/contributors">
<img alt="Contributors" src="https://contrib.rocks/image?repo=krahets/hello-algo&amp;max=300&amp;columns=12" style="width: 100%; max-width: 38.5em;"/>
</a>
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はじめに
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第 0 章   前書き
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0.1   この本について
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0.2   本書の使い方
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0.3   まとめ
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第 1 章   アルゴリズムとの出会い
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第 1 章   アルゴリズムとの出会い
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1.1   アルゴリズムはどこにでもある
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1.2   アルゴリズムとは何か
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1.3   まとめ
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第 2 章   計算量解析
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第 2 章   計算量解析
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2.1   アルゴリズム効率評価
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2.2   反復と再帰
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2.3   時間計算量
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2.4   空間計算量
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2.5   まとめ
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第 3 章   データ構造
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第 3 章   データ構造
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3.1   データ構造の分類
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3.2   基本データ型
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3.3   数値エンコーディング *
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3.4   文字エンコーディング *
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3.5   まとめ
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第 4 章   配列と連結リスト
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第 4 章   配列と連結リスト
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4.1   配列
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4.2   連結リスト
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4.3   リスト
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4.4   メモリとキャッシュ *
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4.5   まとめ
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第 5 章   スタックとキュー
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第 5 章   スタックとキュー
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5.1   スタック
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5.2   キュー
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5.3   両端キュー
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5.4   まとめ
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第 6 章   ハッシュ表
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第 6 章   ハッシュ表
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6.1   ハッシュ表
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6.2   ハッシュ衝突
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6.3   ハッシュアルゴリズム
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6.4   まとめ
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第 7 章   木
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第 7 章   木
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7.1   二分木
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7.2   二分木の走査
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7.3   木の配列表現
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7.4   二分探索木
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7.5   AVL木 *
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7.6   まとめ
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第 8 章   ヒープ
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第 8 章   ヒープ
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8.1   ヒープ
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8.2   ヒープの構築
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8.3   Top-k問題
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8.4   まとめ
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第 9 章   グラフ
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第 9 章   グラフ
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9.1   グラフ
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9.2   グラフの基本操作
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9.3   グラフの走査
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9.4   まとめ
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第 10 章   探索
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第 10 章   探索
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10.1   二分探索
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10.2   二分探索挿入点
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10.3   二分探索の境界
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10.4   ハッシュ最適化戦略
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10.5   探索アルゴリズム再考
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10.6   まとめ
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第 11 章   ソート
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第 11 章   ソート
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11.1   ソートアルゴリズム
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11.2   選択ソート
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11.3   バブルソート
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11.4   挿入ソート
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11.5   クイックソート
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11.6   マージソート
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11.7   ヒープソート
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11.8   バケットソート
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11.9   計数ソート
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11.10   基数ソート
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11.11   まとめ
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第 12 章   分割統治
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第 12 章   分割統治
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12.1   分割統治アルゴリズム
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12.2   分割統治探索戦略
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12.3   二分木構築問題
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12.4   ハノイの塔問題
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12.5   まとめ
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第 13 章   バックトラッキング
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第 13 章   バックトラッキング
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13.1   バックトラッキングアルゴリズム
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13.2   順列問題
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13.3   部分集合和問題
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13.4   Nクイーン問題
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13.5   まとめ
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第 14 章   動的プログラミング
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第 14 章   動的プログラミング
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14.1   動的プログラミング入門
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14.2   DP問題の特性
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14.3   DP問題解決アプローチ
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14.4   0-1ナップサック問題
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14.5   無制限ナップサック問題
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14.6   編集距離問題
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14.7   まとめ
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第 15 章   貪欲法
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第 15 章   貪欲法
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15.1   貪欲アルゴリズム
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15.2   分数ナップサック問題
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15.3   最大容量問題
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15.4   最大積切断問題
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15.5   まとめ
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第 16 章   付録
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第 16 章   付録
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