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)
13021 AtCoder JOIG2022-OPEN: A. ピアノコンクール (Piano Competition)
13020 AtCoder JOIG2021-OPEN: F. デジタルアート (Digital Art)
13019 AtCoder JOIG2021-OPEN: E. パレード (Parade)
13018 AtCoder JOIG2021-OPEN: D. 展覧会 2 (Exhibition 2)
13017 AtCoder JOIG2021-OPEN: C. イルミネーション 2 (Illumination 2)
13016 AtCoder JOIG2021-OPEN: B. 巻物 (Scroll)
13015 AtCoder JOIG2021-OPEN: A. 金平糖 (Konpeito)
13014 AtCoder JOI2023HO: E. 現代的な機械 (Modern Machine)
13013 AtCoder JOI2023HO: D. キャットエクササイズ (Cat Exercise)
13012 AtCoder JOI2023HO: C. 迷路 (Maze)
13011 AtCoder JOI2023HO: B. 宣伝 2 (Advertisement 2)
13010 AtCoder JOI2023HO: A. 碁石ならべ 2 (Stone Arranging 2)
13009 AtCoder JOI2023YO2: E. 日本沈没 2 (Japan Sinks 2)
13008 AtCoder JOI2023YO2: D. 貨物列車 (Freight Train)
13007 AtCoder JOI2023YO2: C. 塗りつぶし (Painting)
13006 AtCoder JOI2023YO2: B. ジョイ四人組 (JOI04)
13005 AtCoder JOI2023YO2: A. 年齢の差 (Age Difference)
13004 AtCoder JOI2023YO1C: D. マラソン大会 (Marathon Race)
13003 AtCoder JOI2023YO1C: C. JOI エディタ (JOI Editor)
13002 AtCoder JOI2023YO1C: B. 11 月 (November)
13001 AtCoder JOI2023YO1C: A. 2 桁の整数 (Two-digit Integer)
13000 AtCoder JOI2023YO1B: D. 点数 (Score)
12999 AtCoder JOI2023YO1B: C. 繰り返し文字列 (Repeating String)
12998 AtCoder JOI2023YO1B: B. 三方比較 (Three-Way Comparison)
12997 AtCoder JOI2023YO1B: A. 時間 (Hour)
12996 AtCoder JOI2023YO1A: D. 二人三脚 (Three-Legged Race)
12995 AtCoder JOI2023YO1A: C. 3 つの箱 (Three Boxes)
12994 AtCoder JOI2023YO1A: B. ゾロ目 (Same Numbers)
12993 AtCoder JOI2023YO1A: A. 長方形 (Rectangle)
12992 AtCoder JOI2022HO: E. 砂の城 2 (Sandcastle 2)
12991 AtCoder JOI2022HO: D. 鉄道旅行 2 (Railway Trip 2)
12990 AtCoder JOI2022HO: C. 選挙で勝とう (Let's Win the Election)
12989 AtCoder JOI2022HO: B. 自習 (Self Study)
12988 AtCoder JOI2022HO: A. インターカステラー (Intercastellar)
12987 AtCoder JOI2022YO2: E. 交易計画 (Trade Plan)
12986 AtCoder JOI2022YO2: D. 飴 2 (Candies 2)
12985 AtCoder JOI2022YO2: C. 国土分割 (Land Division)
12984 AtCoder JOI2022YO2: B. カーペット (Carpet)
12983 AtCoder JOI2022YO2: A. 図書館 2 (Library 2)
12982 AtCoder JOI2022YO1C: D. ボールの移動 (Moving Balls)
12981 AtCoder JOI2022YO1C: C. 運動会 (Sports Day)
12980 AtCoder JOI2022YO1C: B. アイスクリーム (Ice Cream)
12979 AtCoder JOI2022YO1C: A. 身長 (Height)
12978 AtCoder JOI2022YO1B: D. 希少な数 (Rare Number)
12977 AtCoder JOI2022YO1B: C. 次の文字 (Next Character)
12976 AtCoder JOI2022YO1B: B. 短針 (Hour Hand)
12975 AtCoder JOI2022YO1B: A. 立方体 (Cube)
12974 AtCoder JOI2022YO1A: D. 箱と鍵 (Boxes and Keys)
12973 AtCoder JOI2022YO1A: C. 複雑な文字列 (Complex String)
12972 AtCoder JOI2022YO1A: B. 移動 (Moving)
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