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)
15021 DMOJ An Animal Contest 1 P5 - Odd Alpacas
15020 DMOJ An Animal Contest 1 P4 - Alpaca Arrays
15019 DMOJ An Animal Contest 1 P3 - Happy Alpacas
15018 DMOJ An Animal Contest 1 P2 - Alpaca Racing
15017 DMOJ An Animal Contest 1 P1 - Alpaca Shapes
15016 DMOJ Sorting
15015 DMOJ Triple Fat Ladies
15014 DMOJ A20 Gate
15013 DMOJ Mirrored Pairs
15012 DMOJ Mispelling
15011 DMOJ Rotations in 3 Dimensions
15010 DMOJ 2spooky4me
15009 DMOJ 2-Dimensional Range Minimum Query
15008 DMOJ 2-D Permutations
15007 DMOJ 2048
15006 DMOJ 16 BIT S/W ONLY
15005 AtCoder ZONE2021: F. Encounter and Farewell
15004 AtCoder ZONE2021: E. Sneaking
15003 AtCoder ZONE2021: D. Message from Aliens
15002 AtCoder ZONE2021: C. MAD TEAM
15001 AtCoder ZONE2021: B. Sign of Friendship
15000 AtCoder ZONE2021: A. UFO Invasion
14999 AtCoder YUHA-C88: J. 勇者最後の戦い!倒せ悪の大魔王!
14998 AtCoder YUHA-C88: I. 姫への愛情と朽ちた兜
14997 AtCoder YUHA-C88: H. 恐怖!不幸を呼ぶ盾
14996 AtCoder YUHA-C88: G. 志なかばで死んだ勇者の名は…
14995 AtCoder YUHA-C88: F. やって来たぜ!魔王城!
14994 AtCoder YUHA-C88: E. 必殺!無限覇王斬!
14993 AtCoder YUHA-C88: D. 氷柱の上の聖剣
14992 AtCoder YUHA-C88: C. 酒場の冒険者たち
14991 AtCoder YUHA-C88: B. ハヌマーンの試練
14990 AtCoder YUHA-C88: A. エンド・オブ・ビギニング
14989 AtCoder YUHA-C83: E. Camera Control - カメラ・コントロール
14988 AtCoder YUHA-C83: D. Psychic Accelerator - とある超能力の物体加速器
14987 AtCoder YUHA-C83: C. Dendrogram - 樹形図
14986 AtCoder YUHA-C83: B. Sun and Moon - 秘密結社太陽と月の団
14985 AtCoder YUHA-C83: A. Revenge of Voronoi - ボロノイの逆襲
14984 AtCoder YAHOO-PROCON2019-QUAL: F. Pass
14983 AtCoder YAHOO-PROCON2019-QUAL: E. Odd Subrectangles
14982 AtCoder YAHOO-PROCON2019-QUAL: D. Ears
14981 AtCoder YAHOO-PROCON2019-QUAL: C. When I hit my pocket...
14980 AtCoder YAHOO-PROCON2019-QUAL: B. Path
14979 AtCoder YAHOO-PROCON2019-QUAL: A. Anti-Adjacency
14978 AtCoder YAHOO-PROCON2019-FINAL: E. Espionage
14977 AtCoder YAHOO-PROCON2019-FINAL: D. Dangerous Hopscotch
14976 AtCoder YAHOO-PROCON2019-FINAL: C. Checkered Stamps
14975 AtCoder YAHOO-PROCON2019-FINAL: B. Bonsai Grafting
14974 AtCoder YAHOO-PROCON2019-FINAL: A. Affiches
14973 AtCoder YAHOO-PROCON2018-QUAL: E. グラフの問題
14972 AtCoder YAHOO-PROCON2018-QUAL: D. XOR XorY
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