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.

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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)
16151	DMOJ COCI '09 Contest 1 #2 Domino
16150	DMOJ COCI '09 Contest 1 #1 Note
16149	DMOJ COCI '08 Contest 6 #6 Slicice
16148	DMOJ COCI '08 Contest 6 #5 Dostava
16147	DMOJ COCI '08 Contest 6 #4 Cuskija
16146	DMOJ COCI '08 Contest 6 #3 Nered
16145	DMOJ COCI '08 Contest 6 #2 Bazen
16144	DMOJ COCI '08 Contest 6 #1 Buka
16143	DMOJ COCI '08 Contest 5 #6 Kruska
16142	DMOJ COCI '08 Contest 5 #5 Tresnja
16141	DMOJ COCI '08 Contest 5 #4 Lubenica
16140	DMOJ COCI '08 Contest 5 #3 Jagoda
16139	DMOJ COCI '08 Contest 5 #2 Jabuka
16138	DMOJ COCI '08 Contest 5 #1 Ljesnjak
16137	DMOJ COCI '08 Contest 4 #6 Periodni
16136	DMOJ COCI '08 Contest 4 #5 Trezor
16135	DMOJ COCI '08 Contest 4 #4 Slikar
16134	DMOJ COCI '08 Contest 4 #3 Rot
16133	DMOJ COCI '08 Contest 4 #2 Datum
16132	DMOJ COCI '08 Contest 4 #1 Mjehuric
16131	DMOJ COCI '08 Contest 3 #6 Najkraci
16130	DMOJ COCI '08 Contest 3 #5 BST
16129	DMOJ COCI '08 Contest 3 #4 Matrica
16128	DMOJ COCI '08 Contest 3 #3 Cross
16127	DMOJ COCI '08 Contest 3 #2 Kemija
16126	DMOJ COCI '08 Contest 3 #1 Pet
16125	DMOJ COCI '08 Contest 2 #6 Cavli
16124	DMOJ COCI '08 Contest 2 #5 Setnja
16123	DMOJ COCI '08 Contest 2 #4 Svada
16122	DMOJ COCI '08 Contest 2 #3 Perket
16121	DMOJ COCI '08 Contest 2 #2 Reseto
16120	DMOJ COCI '08 Contest 2 #1 Kornislav
16119	DMOJ COCI '08 Contest 1 #6 Krtica
16118	DMOJ COCI '08 Contest 1 #5 Skakavac
16117	DMOJ COCI '08 Contest 1 #4 Jez
16116	DMOJ COCI '08 Contest 1 #3 Mravojed
16115	DMOJ COCI '08 Contest 1 #2 Ptice
16114	DMOJ COCI '08 Contest 1 #1 Skocimis
16113	DMOJ COCI '07 Contest 6 #6 Cestarine
16112	DMOJ COCI '07 Contest 6 #5 Princeza
16111	DMOJ COCI '07 Contest 6 #4 George
16110	DMOJ COCI '07 Contest 6 #3 Granica
16109	DMOJ COCI '07 Contest 6 #2 Semafori
16108	DMOJ COCI '07 Contest 6 #1 Parking
16107	DMOJ COCI '07 Contest 5 #6 Baza
16106	DMOJ COCI '07 Contest 5 #5 Barica
16105	DMOJ COCI '07 Contest 5 #4 Avogadro
16104	DMOJ COCI '07 Contest 5 #3 Jabuke
16103	DMOJ COCI '07 Contest 5 #2 Pascal
16102	DMOJ COCI '07 Contest 5 #1 Tri

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

16151

DMOJ COCI '09 Contest 1 #2 Domino

16150

DMOJ COCI '09 Contest 1 #1 Note

16149

DMOJ COCI '08 Contest 6 #6 Slicice

16148

DMOJ COCI '08 Contest 6 #5 Dostava

16147

DMOJ COCI '08 Contest 6 #4 Cuskija

16146