Starlight: List of Problems

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Over 20,000 problems available. AMC 8/10/12 and AIME problems from 2010-2023; USAJMO/USAMO problems from 2002-2023 available. USACO problems from 2014 to 2023 (all divisions). Codeforces, AtCoder, DMOJ problems are added daily around 04:00 AM UTC, which may cause disruptions.

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ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
12971 AtCoder JOI2022YO1A: A. 余り (Remainder)
12970 AtCoder JOI2021HO: E. ダンジョン 3 (Dungeon 3)
12969 AtCoder JOI2021HO: D. ロボット (Robot)
12968 AtCoder JOI2021HO: C. 集合写真 (Group Photo)
12967 AtCoder JOI2021HO: B. 雪玉 (Snowball)
12966 AtCoder JOI2021HO: A. とてもたのしい家庭菜園 (Growing Vegetables is Fun 4)
12965 AtCoder JOI2021YO2: E. スパイ 2 (Spy 2)
12964 AtCoder JOI2021YO2: D. 安全点検 (Safety Inspection)
12963 AtCoder JOI2021YO2: C. イベント巡り (Event Hopping)
12962 AtCoder JOI2021YO2: B. パンケーキ (Pancake)
12961 AtCoder JOI2021YO2: A. 往復すごろく (Round Sugoroku)
12960 AtCoder JOI2021YO1C: C. 比較 (Comparison)
12959 AtCoder JOI2021YO1C: B. IOI 文字列 (IOI String)
12958 AtCoder JOI2021YO1C: A. 計算 (Calculation)
12957 AtCoder JOI2021YO1B: C. 分割 (Split)
12956 AtCoder JOI2021YO1B: B. ビ太郎と IOI (Bitaro and IOI)
12955 AtCoder JOI2021YO1B: A. 帰省 (Homecoming)
12954 AtCoder JOI2021YO1A: C. 共通要素 (Common Elements)
12953 AtCoder JOI2021YO1A: B. JOI ソート (JOI Sort)
12952 AtCoder JOI2021YO1A: A. 2 番目に大きい整数 (The Second Largest Integer)
12951 AtCoder JOI2020HO: E. 火事 (Fire)
12950 AtCoder JOI2020HO: D. オリンピックバス (Olympic Bus)
12949 AtCoder JOI2020HO: C. スタンプラリー 3 (Collecting Stamps 3)
12948 AtCoder JOI2020HO: B. JJOOII 2 (JJOOII 2)
12947 AtCoder JOI2020HO: A. 長いだけのネクタイ (Just Long Neckties)
12946 AtCoder JOI2020YO2: E. じゃんけん式 (Rock-Scissors-Paper Expression)
12945 AtCoder JOI2020YO2: D. テンキー (Tenkey)
12944 AtCoder JOI2020YO2: C. 桁和 (Digit Sum)
12943 AtCoder JOI2020YO2: B. いちご (Strawberry)
12942 AtCoder JOI2020YO2: A. ポスター (Poster)
12941 AtCoder JOI2020YO1C: C. 最長昇順連続部分列 (Longest Ascending Contiguous Subsequence)
12940 AtCoder JOI2020YO1C: B. キャピタリゼーション (Capitalization)
12939 AtCoder JOI2020YO1C: A. X に最も近い値 (The Nearest Value)
12938 AtCoder JOI2020YO1B: C. 最頻値 (Mode)
12937 AtCoder JOI2020YO1B: B. 文字列の反転 (Inversion of a String)
12936 AtCoder JOI2020YO1B: A. 試験 (Exam)
12935 AtCoder JOI2020YO1A: C. マージ (Merge)
12934 AtCoder JOI2020YO1A: B. 母音を数える (Counting Vowels)
12933 AtCoder JOI2020YO1A: A. 3 つの整数 (Three Integers)
12932 AtCoder JOI2019HO: E. 珍しい都市 (Unique Cities)
12931 AtCoder JOI2019HO: D. コイン集め (Coin Collecting)
12930 AtCoder JOI2019HO: C. たのしいたのしいたのしい家庭菜園 (Growing Vegetables is Fun 3)
12929 AtCoder JOI2019HO: B. 展覧会 (Exhibition)
12928 AtCoder JOI2019HO: A. 勇者ビ太郎 (Bitaro the Brave)
12927 AtCoder JOI2019YO: F. 座席 (Seats)
12926 AtCoder JOI2019YO: E. イルミネーション (Illumination)
12925 AtCoder JOI2019YO: D. 日本沈没 (Japan Sinks)
12924 AtCoder JOI2019YO: C. マルバツスタンプ (Circle Cross Stamps)
12923 AtCoder JOI2019YO: B. すごろくと駒 (Sugoroku and Pieces)
12922 AtCoder JOI2019YO: A. ソーシャルゲーム (Social Game)
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