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Over 20,000 problems available: AMC 8/10/12 and AIME problems from 2010-2024; USAJMO/USAMO problems from 2002-2024; USACO problems from 2014 to 2024 (all divisions); all Codeforces, AtCoder and DMOJ problems. If you leave the search field blank, it returns all problems with the specified type.

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  • AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
  • AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
  • AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
  • AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
  • USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
  • Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
  • AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
  • DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
  • USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
14355 AtCoder TESSOKU-BOOK: A33. Game 2
14354 AtCoder TESSOKU-BOOK: A32. Game 1
14353 AtCoder TESSOKU-BOOK: A31. Divisors
14352 AtCoder TESSOKU-BOOK: A30. Combination
14351 AtCoder TESSOKU-BOOK: A28. Blackboard
14350 AtCoder TESSOKU-BOOK: A01. The First Problem
14349 AtCoder TENKA1-2019: F. Banned X
14348 AtCoder TENKA1-2019: E. Polynomial Divisors
14347 AtCoder TENKA1-2019: D. Three Colors
14346 AtCoder TENKA1-2019: C. Stones
14345 AtCoder TENKA1-2019-BEGINNER: B. *e**** ********e* *e****e* ****e**
14344 AtCoder TENKA1-2019-BEGINNER: A. On the Way
14343 AtCoder TENKA1-2018: F. Circular
14342 AtCoder TENKA1-2018: E. Equilateral
14341 AtCoder TENKA1-2018: D. Crossing
14340 AtCoder TENKA1-2018: C. Align
14339 AtCoder TENKA1-2018-BEGINNER: B. Exchange
14338 AtCoder TENKA1-2018-BEGINNER: A. Measure
14337 AtCoder TENKA1-2017: F. ModularPowerEquation!!
14336 AtCoder TENKA1-2017: E. CARtesian Coodinate
14335 AtCoder TENKA1-2017: D. IntegerotS
14334 AtCoder TENKA1-2017: C. 4/N
14333 AtCoder TENKA1-2017-BEGINNER: B. Different Distribution
14332 AtCoder TENKA1-2017-BEGINNER: A. Accepted...?
14331 AtCoder TENKA1-2016-QUALB: E. 天下一合体
14330 AtCoder TENKA1-2016-QUALB: D. 天下一数列にクエリを投げます
14329 AtCoder TENKA1-2016-QUALB: C. 天下一プログラマーコンテスト1999
14328 AtCoder TENKA1-2016-QUALB: B. 天下一魔力発電
14327 AtCoder TENKA1-2016-QUALB: A. 天下一合成関数
14326 AtCoder TENKA1-2016-QUALA: E. 無限グラフ
14325 AtCoder TENKA1-2016-QUALA: D. グラフィカルグラフ
14324 AtCoder TENKA1-2016-QUALA: C. 山田山本問題
14323 AtCoder TENKA1-2016-QUALA: B. PackDrop
14322 AtCoder TENKA1-2016-QUALA: A. 天下一プログラマーゲーム
14321 AtCoder TENKA1-2016-FINAL: F. Blind Purchase
14320 AtCoder TENKA1-2016-FINAL: E. 串焼きパーティ
14319 AtCoder TENKA1-2016-FINAL: D. 右往左往
14318 AtCoder TENKA1-2016-FINAL: C. たんごたくさん
14317 AtCoder TENKA1-2016-FINAL: B. 今年の B 問題
14316 AtCoder TENKA1-2016-FINAL: A. 今年の A 問題
14315 AtCoder TENKA1-2015-QUALB: E. 天下一演算
14314 AtCoder TENKA1-2015-QUALB: D. 天下一電卓英作文
14313 AtCoder TENKA1-2015-QUALB: C. 擬二等辺三角形
14312 AtCoder TENKA1-2015-QUALB: B. 天下一リテラル
14311 AtCoder TENKA1-2015-QUALB: A. 天下一プログラマーコンテスト1998
14310 AtCoder TENKA1-2015-QUALA: E. 天下一魔法使い
14309 AtCoder TENKA1-2015-QUALA: D. ハシポン
14308 AtCoder TENKA1-2015-QUALA: C. 天下一美術館
14307 AtCoder TENKA1-2015-QUALA: B. stepモード
14306 AtCoder TENKA1-2015-QUALA: A. 展開図プログラマーコンテスト
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