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)
12921 AtCoder JOI2018HO: E. 毒蛇の脱走 (Snake Escaping)
12920 AtCoder JOI2018HO: D. 定期券 (Commuter Pass)
12919 AtCoder JOI2018HO: C. 団子職人 (Dango Maker)
12918 AtCoder JOI2018HO: B. 美術展 (Art Exhibition)
12917 AtCoder JOI2018HO: A. ストーブ (Stove)
12916 AtCoder JOI2018YO: F. L番目のK番目の数 (LthKthNumber)
12915 AtCoder JOI2018YO: E. 森林伐採(Deforestation)
12914 AtCoder JOI2018YO: D. 水ようかん (Mizuyokan)
12913 AtCoder JOI2018YO: C. 幹線道路 (Trunk Road)
12912 AtCoder JOI2018YO: B. 双六 (Sugoroku)
12911 AtCoder JOI2018YO: A. 鉛筆 (Pencils)
12910 AtCoder JOI2017YO: F. ヘビの JOI 君 (Snake JOI)
12909 AtCoder JOI2017YO: E. 尾根 (Ridge)
12908 AtCoder JOI2017YO: D. ぬいぐるみの整理 (Plush Toys)
12907 AtCoder JOI2017YO: C. 休憩スペース (Refreshment Area)
12906 AtCoder JOI2017YO: B. ポイントカード (Point Card)
12905 AtCoder JOI2017YO: A. 電子レンジ (Microwave)
12904 AtCoder JOI2017HO: E. 縄 (Rope)
12903 AtCoder JOI2017HO: D. サッカー (Soccer)
12902 AtCoder JOI2017HO: C. JOIOI 王国 (Kingdom of JOIOI)
12901 AtCoder JOI2017HO: B. 準急電車 (Semiexpress)
12900 AtCoder JOI2017HO: A. フェーン現象 (Foehn Phenomena)
12899 AtCoder JOI2016YO: F. 屋台 (Food stalls)
12898 AtCoder JOI2016YO: E. ゾンビ島 (Zombie Island)
12897 AtCoder JOI2016YO: D. JOI国のお散歩事情 (Walking in JOI Kingdom)
12896 AtCoder JOI2016YO: C. ロシアの旗 (Russian Flag)
12895 AtCoder JOI2016YO: B. ゼッケンの交換 (Swapping Bibs)
12894 AtCoder JOI2016YO: A. 科目選択 (Selecting Subjects)
12893 AtCoder JOI2016HO: E. 断層 (Geologic Fault)
12892 AtCoder JOI2016HO: D. 縄張り (Territory)
12891 AtCoder JOI2016HO: C. 鉄道運賃 (Train Fare)
12890 AtCoder JOI2016HO: B. スタンプラリー 2 (Collecting Stamps 2)
12889 AtCoder JOI2016HO: A. オレンジの出荷 (Oranges)
12888 AtCoder JOI2015YO: F. 財宝 (Treasures)
12887 AtCoder JOI2015YO: E. 砂の城 (Sandcastle)
12886 AtCoder JOI2015YO: D. シルクロード (Silk Road)
12885 AtCoder JOI2015YO: C. 気象予報士 (Weather Forecaster)
12884 AtCoder JOI2015YO: B. クリスマスパーティー (Christmas Party)
12883 AtCoder JOI2015YO: A. 水道料金 (Water Rate)
12882 AtCoder JOI2015HO: E. 城壁 (Rampart)
12881 AtCoder JOI2015HO: D. 舞踏会 (Ball)
12880 AtCoder JOI2015HO: C. JOI 公園 (JOI Park)
12879 AtCoder JOI2015HO: B. ケーキの切り分け2 (Cake 2)
12878 AtCoder JOI2015HO: A. 鉄道旅行 (Railroad Trip)
12877 AtCoder JOI2014YO: F. 小籠包 (Xiao Long Bao)
12876 AtCoder JOI2014YO: E. タクシー (Taxis)
12875 AtCoder JOI2014YO: D. 部活のスケジュール表 (Schedule)
12874 AtCoder JOI2014YO: C. 超都観光 (Super Metropolis)
12873 AtCoder JOI2014YO: B. 投票 (Vote)
12872 AtCoder JOI2014YO: A. 平均点 (Average Score)
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