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)
12851 AtCoder JOI2012YO: B. サッカー (Soccer)
12850 AtCoder JOI2012YO: A. ランチ (Lunch)
12849 AtCoder JOI2012HO: E. JOI 国のお祭り事情 (Festivals in JOI Kingdom)
12848 AtCoder JOI2012HO: D. 釘 (Nails)
12847 AtCoder JOI2012HO: C. 夜店 (Night Market)
12846 AtCoder JOI2012HO: B. たのしいカードゲーム (Card Game is Fun)
12845 AtCoder JOI2012HO: A. JJOOII (JJOOII)
12844 AtCoder JOI2011YO: F. JOI 旗 (JOI Flag)
12843 AtCoder JOI2011YO: E. チーズ (Cheese)
12842 AtCoder JOI2011YO: D. 1 年生 (A First Grader)
12841 AtCoder JOI2011YO: C. タイル (Tile)
12840 AtCoder JOI2011YO: B. 指輪 (Ring)
12839 AtCoder JOI2011YO: A. 合計時間 (Total Time)
12838 AtCoder JOI2011HO: E. 微生物実験 (Bug Party)
12837 AtCoder JOI2011HO: D. 歩くサンタクロース (Walking Santa)
12836 AtCoder JOI2011HO: C. JOI 国の買い物事情 (Shopping in JOI Kingdom)
12835 AtCoder JOI2011HO: B. 古本屋 (Books)
12834 AtCoder JOI2011HO: A. 惑星探査 (Planetary Exploration)
12833 AtCoder JOI2010YO: F. 方向音痴のトナカイ
12832 AtCoder JOI2010YO: E. 通勤経路
12831 AtCoder JOI2010YO: D. カード並べ
12830 AtCoder JOI2010YO: C. パーティー
12829 AtCoder JOI2010YO: B. すごろく
12828 AtCoder JOI2010YO: A. レシート
12827 AtCoder JOI2010HO: E. ダンジョン
12826 AtCoder JOI2010HO: D. 博覧会
12825 AtCoder JOI2010HO: C. つらら
12824 AtCoder JOI2010HO: B. お菓子の分割
12823 AtCoder JOI2010HO: A. 旅人
12822 AtCoder JOI2009YO: F. ビンゴ
12821 AtCoder JOI2009YO: E. シャッフル
12820 AtCoder JOI2009YO: D. 薄氷渡り
12819 AtCoder JOI2009YO: C. 連鎖
12818 AtCoder JOI2009YO: B. コンテスト
12817 AtCoder JOI2009YO: A. タイムカード
12816 AtCoder JOI2009HO: E. 認証レベル
12815 AtCoder JOI2009HO: D. 散歩
12814 AtCoder JOI2009HO: C. あみだくじ
12813 AtCoder JOI2009HO: B. ピザ
12812 AtCoder JOI2009HO: A. IOIOI
12811 AtCoder JOI2008YO: F. 船旅
12810 AtCoder JOI2008YO: E. おせんべい
12809 AtCoder JOI2008YO: D. 星座探し
12808 AtCoder JOI2008YO: C. カードゲーム
12807 AtCoder JOI2008YO: B. JOIとIOI
12806 AtCoder JOI2008YO: A. おつり
12805 AtCoder JOI2008HO: E. ペンキの色
12804 AtCoder JOI2008HO: D. ぴょんぴょん川渡り
12803 AtCoder JOI2008HO: C. ダーツ
12802 AtCoder JOI2008HO: B. 共通部分文字列
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