Starlight: List of Problems

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.

Need help searching? Click for format/examples of problems

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)
21851	2010 AMC 12B Problem 24
21850	2010 AMC 12B Problem 23
21849	2010 AMC 12B Problem 22
21848	2010 AMC 12B Problem 21
21847	2010 AMC 12B Problem 20
21846	2010 AMC 12B Problem 19
21845	2010 AMC 12B Problem 18
21844	2010 AMC 12B Problem 17
21843	2010 AMC 12B Problem 16
21842	2010 AMC 12B Problem 15
21841	2010 AMC 12B Problem 14
21840	2010 AMC 12B Problem 13
21839	2010 AMC 12B Problem 12
21838	2010 AMC 12B Problem 11
21837	2010 AMC 12B Problem 10
21836	2010 AMC 12B Problem 9
21835	2010 AMC 12B Problem 8
21834	2010 AMC 12B Problem 7
21833	2010 AMC 12B Problem 6
21832	2010 AMC 12B Problem 5
21831	2010 AMC 12B Problem 4
21830	2010 AMC 12B Problem 3
21829	2010 AMC 12B Problem 2
21828	2010 AMC 12B Problem 1
21827	2010 AMC 12A Problem 25
21826	2010 AMC 12A Problem 24
21825	2010 AMC 12A Problem 23
21824	2010 AMC 12A Problem 22
21823	2010 AMC 12A Problem 21
21822	2010 AMC 12A Problem 20
21821	2010 AMC 12A Problem 19
21820	2010 AMC 12A Problem 18
21819	2010 AMC 12A Problem 17
21818	2010 AMC 12A Problem 16
21817	2010 AMC 12A Problem 15
21816	2010 AMC 12A Problem 14
21815	2010 AMC 12A Problem 13
21814	2010 AMC 12A Problem 12
21813	2010 AMC 12A Problem 11
21812	2010 AMC 12A Problem 10
21811	2010 AMC 12A Problem 9
21810	2010 AMC 12A Problem 8
21809	2010 AMC 12A Problem 7
21808	2010 AMC 12A Problem 6
21807	2010 AMC 12A Problem 5
21806	2010 AMC 12A Problem 4
21805	2010 AMC 12A Problem 3
21804	2010 AMC 12A Problem 2
21803	2010 AMC 12A Problem 1
21802	2009 AMC 12B Problem 25

Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)

21851

2010 AMC 12B Problem 24

21850

2010 AMC 12B Problem 23

21849

2010 AMC 12B Problem 22

21848

2010 AMC 12B Problem 21

21847

2010 AMC 12B Problem 20

21846