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JOI 紋章 (JOI Emblem)"},{"id":"joi2014ho2","contest_id":"joi2014ho","problem_index":"B","name":"IOI 饅頭 (IOI Manju)","title":"B. 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JOI国のお散歩事情 (Walking in JOI Kingdom)"},{"id":"joi2016yo_e","contest_id":"joi2016yo","problem_index":"E","name":"ゾンビ島 (Zombie Island)","title":"E. ゾンビ島 (Zombie Island)"},{"id":"joi2016yo_f","contest_id":"joi2016yo","problem_index":"F","name":"屋台 (Food stalls)","title":"F. 屋台 (Food stalls)"},{"id":"joi2017ho_a","contest_id":"joi2017ho","problem_index":"A","name":"フェーン現象 (Foehn Phenomena)","title":"A. フェーン現象 (Foehn Phenomena)"},{"id":"joi2017ho_b","contest_id":"joi2017ho","problem_index":"B","name":"準急電車 (Semiexpress)","title":"B. 準急電車 (Semiexpress)"},{"id":"joi2017ho_c","contest_id":"joi2017ho","problem_index":"C","name":"JOIOI 王国 (Kingdom of JOIOI)","title":"C. 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X に最も近い値 (The Nearest Value)"},{"id":"joi2020_yo1c_b","contest_id":"joi2020yo1c","problem_index":"B","name":"キャピタリゼーション (Capitalization)","title":"B. キャピタリゼーション (Capitalization)"},{"id":"joi2020_yo1c_c","contest_id":"joi2020yo1c","problem_index":"C","name":"最長昇順連続部分列 (Longest Ascending Contiguous Subsequence)","title":"C. 最長昇順連続部分列 (Longest Ascending Contiguous Subsequence)"},{"id":"joi2020_yo2_a","contest_id":"joi2020yo2","problem_index":"A","name":"ポスター (Poster)","title":"A. ポスター (Poster)"},{"id":"joi2020_yo2_b","contest_id":"joi2020yo2","problem_index":"B","name":"いちご (Strawberry)","title":"B. いちご (Strawberry)"},{"id":"joi2020_yo2_c","contest_id":"joi2020yo2","problem_index":"C","name":"桁和 (Digit Sum)","title":"C. 桁和 (Digit Sum)"},{"id":"joi2020_yo2_d","contest_id":"joi2020yo2","problem_index":"D","name":"テンキー (Tenkey)","title":"D. テンキー (Tenkey)"},{"id":"joi2020_yo2_e","contest_id":"joi2020yo2","problem_index":"E","name":"じゃんけん式 (Rock-Scissors-Paper Expression)","title":"E. じゃんけん式 (Rock-Scissors-Paper Expression)"},{"id":"joi2020ho_a","contest_id":"joi2020ho","problem_index":"A","name":"長いだけのネクタイ (Just Long Neckties)","title":"A. 長いだけのネクタイ (Just Long Neckties)"},{"id":"joi2020ho_b","contest_id":"joi2020ho","problem_index":"B","name":"JJOOII 2 (JJOOII 2)","title":"B. JJOOII 2 (JJOOII 2)"},{"id":"joi2020ho_c","contest_id":"joi2020ho","problem_index":"C","name":"スタンプラリー 3 (Collecting Stamps 3)","title":"C. スタンプラリー 3 (Collecting Stamps 3)"},{"id":"joi2020ho_d","contest_id":"joi2020ho","problem_index":"D","name":"オリンピックバス (Olympic Bus)","title":"D. オリンピックバス (Olympic Bus)"},{"id":"joi2020ho_e","contest_id":"joi2020ho","problem_index":"E","name":"火事 (Fire)","title":"E. 火事 (Fire)"},{"id":"joi2021_yo1a_a","contest_id":"joi2021yo1a","problem_index":"A","name":"2 番目に大きい整数 (The Second Largest Integer)","title":"A. 2 番目に大きい整数 (The Second Largest Integer)"},{"id":"joi2021_yo1a_b","contest_id":"joi2021yo1a","problem_index":"B","name":"JOI ソート (JOI Sort)","title":"B. JOI ソート (JOI Sort)"},{"id":"joi2021_yo1a_c","contest_id":"joi2021yo1a","problem_index":"C","name":"共通要素 (Common Elements)","title":"C. 共通要素 (Common Elements)"},{"id":"joi2021_yo1b_a","contest_id":"joi2021yo1b","problem_index":"A","name":"帰省 (Homecoming)","title":"A. 帰省 (Homecoming)"},{"id":"joi2021_yo1b_b","contest_id":"joi2021yo1b","problem_index":"B","name":"ビ太郎と IOI (Bitaro and IOI)","title":"B. ビ太郎と IOI (Bitaro and IOI)"},{"id":"joi2021_yo1b_c","contest_id":"joi2021yo1b","problem_index":"C","name":"分割 (Split)","title":"C. 分割 (Split)"},{"id":"joi2021_yo1c_a","contest_id":"joi2021yo1c","problem_index":"A","name":"計算 (Calculation)","title":"A. 計算 (Calculation)"},{"id":"joi2021_yo1c_b","contest_id":"joi2021yo1c","problem_index":"B","name":"IOI 文字列 (IOI String)","title":"B. IOI 文字列 (IOI String)"},{"id":"joi2021_yo1c_c","contest_id":"joi2021yo1c","problem_index":"C","name":"比較 (Comparison)","title":"C. 比較 (Comparison)"},{"id":"joi2021_yo2_a","contest_id":"joi2021yo2","problem_index":"A","name":"往復すごろく (Round Sugoroku)","title":"A. 往復すごろく (Round Sugoroku)"},{"id":"joi2021_yo2_b","contest_id":"joi2021yo2","problem_index":"B","name":"パンケーキ (Pancake)","title":"B. パンケーキ (Pancake)"},{"id":"joi2021_yo2_c","contest_id":"joi2021yo2","problem_index":"C","name":"イベント巡り (Event Hopping)","title":"C. イベント巡り (Event Hopping)"},{"id":"joi2021_yo2_d","contest_id":"joi2021yo2","problem_index":"D","name":"安全点検 (Safety Inspection)","title":"D. 安全点検 (Safety Inspection)"},{"id":"joi2021_yo2_e","contest_id":"joi2021yo2","problem_index":"E","name":"スパイ 2 (Spy 2)","title":"E. スパイ 2 (Spy 2)"},{"id":"joi2021ho_a","contest_id":"joi2021ho","problem_index":"A","name":"とてもたのしい家庭菜園 (Growing Vegetables is Fun 4)","title":"A. とてもたのしい家庭菜園 (Growing Vegetables is Fun 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(Packing)"},{"id":"joisc2007_route","contest_id":"joisc2007","problem_index":"route","name":"象使い (Route)","title":"route. 象使い (Route)"},{"id":"joisc2007_salt","contest_id":"joisc2007","problem_index":"salt","name":"SALT TREE XV","title":"salt. 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UFOの飛行場 (UFO)"},{"id":"joisc2012_broadcasting1","contest_id":"joisc2012","problem_index":"broadcasting1","name":"テレビ放送","title":"broadcasting1. テレビ放送"},{"id":"joisc2012_broadcasting2","contest_id":"joisc2012","problem_index":"broadcasting2","name":"テレビ放送","title":"broadcasting2. テレビ放送"},{"id":"joisc2012_broadcasting3","contest_id":"joisc2012","problem_index":"broadcasting3","name":"テレビ放送","title":"broadcasting3. テレビ放送"},{"id":"joisc2012_broadcasting4","contest_id":"joisc2012","problem_index":"broadcasting4","name":"テレビ放送","title":"broadcasting4. テレビ放送"},{"id":"joisc2012_broadcasting5","contest_id":"joisc2012","problem_index":"broadcasting5","name":"テレビ放送","title":"broadcasting5. テレビ放送"},{"id":"joisc2012_building2","contest_id":"joisc2012","problem_index":"building2","name":"ビルの飾り付け 2","title":"building2. ビルの飾り付け 2"},{"id":"joisc2012_chinese","contest_id":"joisc2012","problem_index":"chinese","name":"中華料理","title":"chinese. 中華料理"},{"id":"joisc2012_constellation","contest_id":"joisc2012","problem_index":"constellation","name":"星座","title":"constellation. 星座"},{"id":"joisc2012_copypaste","contest_id":"joisc2012","problem_index":"copypaste","name":"コピー＆ペースト","title":"copypaste. コピー＆ペースト"},{"id":"joisc2012_fish","contest_id":"joisc2012","problem_index":"fish","name":"魚","title":"fish. 魚"},{"id":"joisc2012_fortune_telling","contest_id":"joisc2012","problem_index":"fortune_telling","name":"占い","title":"fortune_telling. 占い"},{"id":"joisc2012_invitation","contest_id":"joisc2012","problem_index":"invitation","name":"招待","title":"invitation. 招待"},{"id":"joisc2012_joi_flag","contest_id":"joisc2012","problem_index":"joi_flag","name":"日本情報オリンピック旗","title":"joi_flag. 日本情報オリンピック旗"},{"id":"joisc2012_kangaroo","contest_id":"joisc2012","problem_index":"kangaroo","name":"カンガルー","title":"kangaroo. カンガルー"},{"id":"joisc2012_rotate","contest_id":"joisc2012","problem_index":"rotate","name":"回転","title":"rotate. 回転"},{"id":"joisc2012_sokoban","contest_id":"joisc2012","problem_index":"sokoban","name":"倉庫番","title":"sokoban. 倉庫番"},{"id":"joisc2013_bustour","contest_id":"joisc2013-day1","problem_index":"1","name":"バスの乗り継ぎ (Bus Tour)","title":"1. バスの乗り継ぎ (Bus Tour)"},{"id":"joisc2013_cake","contest_id":"joisc2013-day3","problem_index":"1","name":"ケーキの切り分け (Cake)","title":"1. ケーキの切り分け (Cake)"},{"id":"joisc2013_collecting","contest_id":"joisc2013-day1","problem_index":"2","name":"たのしい画像収集 (Collecting Images is Fun)","title":"2. たのしい画像収集 (Collecting Images is Fun)"},{"id":"joisc2013_communication","contest_id":"joisc2013-day1","problem_index":"3","name":"通信妨害 (Communication Jamming)","title":"3. 通信妨害 (Communication Jamming)"},{"id":"joisc2013_construction","contest_id":"joisc2013-day2","problem_index":"1","name":"建設事業 (Construction Project)","title":"1. 建設事業 (Construction Project)"},{"id":"joisc2013_joi_poster","contest_id":"joisc2013-day1","problem_index":"4","name":"JOIポスター (JOI Poster)","title":"4. JOIポスター (JOI Poster)"},{"id":"joisc2013_koala","contest_id":"joisc2013-day3","problem_index":"2","name":"コアラ (Koala)","title":"2. コアラ (Koala)"},{"id":"joisc2013_mascots","contest_id":"joisc2013-day2","problem_index":"2","name":"マスコットの片付け (Mascots)","title":"2. マスコットの片付け (Mascots)"},{"id":"joisc2013_messenger","contest_id":"joisc2013-day4","problem_index":"1","name":"メッセンジャー (Messenger)","title":"1. メッセンジャー (Messenger)"},{"id":"joisc2013_mountain","contest_id":"joisc2013-day3","problem_index":"3","name":"山岳救助隊 (Mountain Rescue Team)","title":"3. 山岳救助隊 (Mountain Rescue Team)"},{"id":"joisc2013_presents","contest_id":"joisc2013-day4","problem_index":"2","name":"プレゼント (Presents)","title":"2. プレゼント (Presents)"},{"id":"joisc2013_spaceships","contest_id":"joisc2013-day4","problem_index":"3","name":"宇宙船 (Spaceships)","title":"3. 宇宙船 (Spaceships)"},{"id":"joisc2013_spy","contest_id":"joisc2013-day2","problem_index":"3","name":"スパイ (Spy)","title":"3. スパイ (Spy)"},{"id":"joisc2014_a","contest_id":"joisc2014","problem_index":"A","name":"バス通学","title":"A. バス通学"},{"id":"joisc2014_b","contest_id":"joisc2014","problem_index":"B","name":"たのしい家庭菜園","title":"B. たのしい家庭菜園"},{"id":"joisc2014_c","contest_id":"joisc2014","problem_index":"C","name":"歴史の研究","title":"C. 歴史の研究"},{"id":"joisc2014_d","contest_id":"joisc2014","problem_index":"D","name":"ラーメンの食べ比べ","title":"D. ラーメンの食べ比べ"},{"id":"joisc2014_e","contest_id":"joisc2014","problem_index":"E","name":"水筒","title":"E. 水筒"},{"id":"joisc2014_f","contest_id":"joisc2014","problem_index":"F","name":"友だちをつくろう","title":"F. 友だちをつくろう"},{"id":"joisc2014_g","contest_id":"joisc2014","problem_index":"G","name":"スタンプラリー","title":"G. スタンプラリー"},{"id":"joisc2014_h","contest_id":"joisc2014","problem_index":"H","name":"JOIOJI","title":"H. JOIOJI"},{"id":"joisc2014_i","contest_id":"joisc2014","problem_index":"I","name":"かかし","title":"I. かかし"},{"id":"joisc2014_j","contest_id":"joisc2014","problem_index":"J","name":"電圧","title":"J. 電圧"},{"id":"joisc2014_k","contest_id":"joisc2014","problem_index":"K","name":"二人の星座","title":"K. 二人の星座"},{"id":"joisc2014_l","contest_id":"joisc2014","problem_index":"L","name":"漢字しりとり","title":"L. 漢字しりとり"},{"id":"joisc2014_m","contest_id":"joisc2014","problem_index":"M","name":"ストラップ","title":"M. ストラップ"},{"id":"joisc2015_a","contest_id":"joisc2015","problem_index":"A","name":"コピー&ペースト 2","title":"A. コピー&ペースト 2"},{"id":"joisc2015_b","contest_id":"joisc2015","problem_index":"B","name":"愉快なロゴデザイン","title":"B. 愉快なロゴデザイン"},{"id":"joisc2015_c","contest_id":"joisc2015","problem_index":"C","name":"たのしいたのしい家庭菜園","title":"C. たのしいたのしい家庭菜園"},{"id":"joisc2015_d","contest_id":"joisc2015","problem_index":"D","name":"IOIOI カード占い","title":"D. IOIOI カード占い"},{"id":"joisc2015_e","contest_id":"joisc2015","problem_index":"E","name":"ビルの飾りつけ 3","title":"E. ビルの飾りつけ 3"},{"id":"joisc2015_f","contest_id":"joisc2015","problem_index":"F","name":"合鍵","title":"F. 合鍵"},{"id":"joisc2015_g","contest_id":"joisc2015","problem_index":"G","name":"道路整備","title":"G. 道路整備"},{"id":"joisc2015_h","contest_id":"joisc2015","problem_index":"H","name":"AAQQZ","title":"H. AAQQZ"},{"id":"joisc2015_i","contest_id":"joisc2015","problem_index":"I","name":"とてもたのしいカードゲーム","title":"I. とてもたのしいカードゲーム"},{"id":"joisc2015_j","contest_id":"joisc2015","problem_index":"J","name":"道案内","title":"J. 道案内"},{"id":"joisc2015_k","contest_id":"joisc2015","problem_index":"K","name":"遺産相続","title":"K. 遺産相続"},{"id":"joisc2015_l","contest_id":"joisc2015","problem_index":"L","name":"記憶縛り","title":"L. 記憶縛り"},{"id":"joisc2015_m","contest_id":"joisc2015","problem_index":"M","name":"防壁","title":"M. 防壁"},{"id":"joisc2016_a","contest_id":"joisc2016","problem_index":"A","name":"マトリョーシカ人形","title":"A. マトリョーシカ人形"},{"id":"joisc2016_b","contest_id":"joisc2016","problem_index":"B","name":"神経衰弱","title":"B. 神経衰弱"},{"id":"joisc2016_c","contest_id":"joisc2016","problem_index":"C","name":"ソリティア","title":"C. ソリティア"},{"id":"joisc2016_d","contest_id":"joisc2016","problem_index":"D","name":"雇用計画","title":"D. 雇用計画"},{"id":"joisc2016_e","contest_id":"joisc2016","problem_index":"E","name":"サンドイッチ","title":"E. サンドイッチ"},{"id":"joisc2016_f","contest_id":"joisc2016","problem_index":"F","name":"トイレ","title":"F. トイレ"},{"id":"joisc2016_g","contest_id":"joisc2016","problem_index":"G","name":"ダンジョン2","title":"G. ダンジョン2"},{"id":"joisc2016_h","contest_id":"joisc2016","problem_index":"H","name":"回転寿司","title":"H. 回転寿司"},{"id":"joisc2016_i","contest_id":"joisc2016","problem_index":"I","name":"電報","title":"I. 電報"},{"id":"joisc2016_j","contest_id":"joisc2016","problem_index":"J","name":"危険なスケート","title":"J. 危険なスケート"},{"id":"joisc2016_k","contest_id":"joisc2016","problem_index":"K","name":"雪降る道路","title":"K. 雪降る道路"},{"id":"joisc2016_l","contest_id":"joisc2016","problem_index":"L","name":"最悪の記者2","title":"L. 最悪の記者2"},{"id":"joisc2017_a","contest_id":"joisc2017","problem_index":"A","name":"開拓 (Cultivation)","title":"A. 開拓 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Mansion)"},{"id":"joisc2017_i","contest_id":"joisc2017","problem_index":"I","name":"自然公園 (Natural Park)","title":"I. 自然公園 (Natural Park)"},{"id":"joisc2017_j","contest_id":"joisc2017","problem_index":"J","name":"誘拐 2 (Abduction 2)","title":"J. 誘拐 2 (Abduction 2)"},{"id":"joisc2017_k","contest_id":"joisc2017","problem_index":"K","name":"都市 (City)","title":"K. 都市 (City)"},{"id":"joisc2017_l","contest_id":"joisc2017","problem_index":"L","name":"ドラゴン 2 (Dragon 2)","title":"L. ドラゴン 2 (Dragon 2)"},{"id":"joisc2018_a","contest_id":"joisc2018","problem_index":"A","name":"高速道路の建設 (Construction of Highway)","title":"A. 高速道路の建設 (Construction of Highway)"},{"id":"joisc2018_b","contest_id":"joisc2018","problem_index":"B","name":"柵 (Fences)","title":"B. 柵 (Fences)"},{"id":"joisc2018_c","contest_id":"joisc2018","problem_index":"C","name":"テント  (Tents)","title":"C. テント  (Tents)"},{"id":"joisc2018_d","contest_id":"joisc2018","problem_index":"D","name":"修行 (Asceticism)","title":"D. 修行 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