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)
19601	DMOJ WC '16 Contest 4 S1 - Parking Duty
19600	DMOJ WC '16 Contest 4 J2 - You're Dead!
19599	DMOJ WC '16 Contest 4 J1 - Anyone Can Be Anything
19598	DMOJ WC '16 Contest 3 S4 - Replay Value
19597	DMOJ WC '16 Contest 3 S3 - Puzzle Rooms
19596	DMOJ WC '16 Contest 3 S2 - Training Regimen
19595	DMOJ WC '16 Contest 3 S1 - Cutting Edge
19594	DMOJ WC '16 Contest 3 J2 - Pokéwarehouses
19593	DMOJ WC '16 Contest 3 J1 - The Elite N
19592	DMOJ WC '16 Contest 2 S4 - Diplomacy
19591	DMOJ WC '16 Contest 2 S3 - Turbolift Testing
19590	DMOJ WC '16 Contest 2 S2 - Away Mission
19589	DMOJ WC '16 Contest 2 S1 - Most Illogical
19588	DMOJ WC '16 Contest 2 J2 - EHC
19587	DMOJ WC '16 Contest 2 J1 - The Perfect Mate
19586	DMOJ WC '16 Contest 1 S4 - TP
19585	DMOJ WC '16 Contest 1 S3 - Tricky's Treats
19584	DMOJ WC '16 Contest 1 S2 - Alucard's Quest
19583	DMOJ WC '16 Contest 1 S1 - Hide and Seek
19582	DMOJ WC '16 Contest 1 J2 - Frankenstein's Monster
19581	DMOJ WC '16 Contest 1 J1 - A Spooky Season
19580	DMOJ WC '15 Finals S5 - Supply Chain
19579	DMOJ WC '15 Finals S4 - Server Hacking
19578	DMOJ WC '15 Finals S3 - Driving Range
19577	DMOJ WC '15 Finals S2 - Hydration
19576	DMOJ WC '15 Finals S1 - Fuzzbiz
19575	DMOJ WC '15 Finals J2 - The Oxford Comma
19574	DMOJ WC '15 Finals J1 - Vertical Posting
19573	DMOJ WC '15 Contest 4 S4 - Stakeout
19572	DMOJ WC '15 Contest 4 S3 - Coded Paper
19571	DMOJ WC '15 Contest 4 S2 - World Tour
19570	DMOJ WC '15 Contest 4 S1 - Shootout
19569	DMOJ WC '15 Contest 4 J4 - Target Practice
19568	DMOJ WC '15 Contest 4 J2 - Mission Briefing
19567	DMOJ WC '15 Contest 4 J1 - Telling Time
19566	DMOJ WC '15 Contest 3 S4 - Lex Luthor's Landmines
19565	DMOJ WC '15 Contest 3 S3 - Rescue Mission
19564	DMOJ WC '15 Contest 3 S2 - Detective Work
19563	DMOJ WC '15 Contest 3 S1 - Energy Absorption
19562	DMOJ WC '15 Contest 3 J4 - LexCorp Infiltration
19561	DMOJ WC '15 Contest 3 J3 - Red Sun Simulator
19560	DMOJ WC '15 Contest 3 J2 - Electroshock Therapy
19559	DMOJ WC '15 Contest 3 J1 - Battle Predictions
19558	DMOJ WC '15 Contest 2 S4 - The Force Awakens (Senior)
19557	DMOJ WC '15 Contest 2 S3 - Revenge of the Sith
19556	DMOJ WC '15 Contest 2 S2 - Attack of the Clones
19555	DMOJ WC '15 Contest 2 S1 - The Phantom Menace
19554	DMOJ WC '15 Contest 2 J4 - The Force Awakens (Junior)
19553	DMOJ WC '15 Contest 2 J3 - Return of the Jedi
19552	DMOJ WC '15 Contest 2 J2 - The Empire Strikes Back

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

19601

DMOJ WC '16 Contest 4 S1 - Parking Duty

19600

DMOJ WC '16 Contest 4 J2 - You're Dead!

19599

DMOJ WC '16 Contest 4 J1 - Anyone Can Be Anything

19598

DMOJ WC '16 Contest 3 S4 - Replay Value

19597

DMOJ WC '16 Contest 3 S3 - Puzzle Rooms

19596