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)
13371 AtCoder KUPC2012: H. 植林
13370 AtCoder KUPC2012: G. 村
13369 AtCoder KUPC2012: F. Acceleration of Network
13368 AtCoder KUPC2012: E. じゃんけん
13367 AtCoder KUPC2012: D. 権力
13366 AtCoder KUPC2012: C. ソーシャル
13365 AtCoder KUPC2012: B. 簡易オセロ
13364 AtCoder KUPC2012: K. XOR回廊
13363 AtCoder KUPC2012: J. 刺身
13362 AtCoder KUPC2012: A. アルデンテ
13361 AtCoder KEYENCE2021: F. Keyence Repetition
13360 AtCoder KEYENCE2021: E. Greedy Ant
13359 AtCoder KEYENCE2021: D. Choosing Up Sides
13358 AtCoder KEYENCE2021: C. Robot on Grid
13357 AtCoder KEYENCE2021: B. Mex Boxes
13356 AtCoder KEYENCE2021: A. Two Sequences 2
13355 AtCoder KEYENCE2020: F. Monochromization
13354 AtCoder KEYENCE2020: E. Bichromization
13353 AtCoder KEYENCE2020: D. Swap and Flip
13352 AtCoder KEYENCE2020: C. Subarray Sum
13351 AtCoder KEYENCE2020: B. Robot Arms
13350 AtCoder KEYENCE2020: A. Painting
13349 AtCoder KEYENCE2019: F. Paper Cutting
13348 AtCoder KEYENCE2019: E. Connecting Cities
13347 AtCoder KEYENCE2019: D. Double Landscape
13346 AtCoder KEYENCE2019: C. Exam and Wizard
13345 AtCoder KEYENCE2019: B. KEYENCE String
13344 AtCoder KEYENCE2019: A. Beginning
13343 AtCoder K4PC: G. 42
13342 AtCoder K4PC: F. タイトル未定(Untitled)
13341 AtCoder K4PC: E. はじめての動的計画法(Easy Dynamic Programming)
13340 AtCoder K4PC: D. たのしい運動会(School Sports is Fun)
13339 AtCoder K4PC: C. 山登り(Mountain Climbing)
13338 AtCoder K4PC: B. コミュニケーション能力(Communication Ability)
13337 AtCoder K4PC: A. ブロックの移動(Blocks)
13336 AtCoder K2PC-HARD: E. 暗号化(Encipherment)
13335 AtCoder K2PC-HARD: D. マシュマロ(Marshmallow)
13334 AtCoder K2PC-HARD: C. お気に入りの数2(Favorite Number2)
13333 AtCoder K2PC-HARD: B. 虫歯(Cavity)
13332 AtCoder K2PC-HARD: A. 紅茶(Tea)
13331 AtCoder K2PC-EASY: E. お気に入りの数2(Favorite Number2)
13330 AtCoder K2PC-EASY: D. 虫歯(Cavity)
13329 AtCoder K2PC-EASY: C. 紅茶(Tea)
13328 AtCoder K2PC-EASY: B. ビットマニア(BITMANIA)
13327 AtCoder K2PC-EASY: A. ハンバーガー(Hamburger)
13326 AtCoder JUDGE-UPDATE-202004: D. Calculating GCD
13325 AtCoder JUDGE-UPDATE-202004: C. Numbering Blocks
13324 AtCoder JUDGE-UPDATE-202004: B. Picking Balls
13323 AtCoder JUDGE-UPDATE-202004: A. Walking Takahashi
13322 AtCoder JSC2022-FINAL-OPEN: G. Bipartite Partition
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