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)
19701	DMOJ WC '97 P1 - Searching Quickly
19700	DMOJ WC '96 P6 - Bases Multiplication
19699	DMOJ WC '96 P5 - Plentiful Paths
19698	DMOJ WC '96 P3 - Hidden Geography
19697	DMOJ WC '96 P2 - Row and Column
19696	DMOJ WC '96 P1 - Fishes in a Tank
19695	DMOJ WC '95 P5 - Factorial Power
19694	DMOJ WC '95 P4 - Wildcard
19693	DMOJ WC '95 P3 - Smallest Latin Square
19692	DMOJ WC '95 P2 - Round Numbers
19691	DMOJ WC '95 P1 - Coded Message
19690	DMOJ WC '18 Finals S5 - Opening Weekend
19689	DMOJ WC '18 Finals S4 - Posters
19688	DMOJ WC '18 Finals S3 - Screen Time
19687	DMOJ WC '18 Finals S2 - Top Billing
19686	DMOJ WC '18 Finals S1 - Behind the Scenes
19685	DMOJ WC '18 Finals J2 - Script Doctor
19684	DMOJ WC '18 Finals J1 - Conditional Contracts
19683	DMOJ WC '18 Contest 4 S4 - Super Luigi Odyssey
19682	DMOJ WC '18 Contest 4 S3 - Dance Royale
19681	DMOJ WC '18 Contest 4 S2 - Farming Simulator
19680	DMOJ WC '18 Contest 4 S1 - World of StarCraft
19679	DMOJ WC '18 Contest 4 J4 - Your Name, Please
19678	DMOJ WC '18 Contest 4 J3 - Inventory
19677	DMOJ WC '18 Contest 4 J2 - Life Insurance
19676	DMOJ WC '18 Contest 4 J1 - A Fistful of Quarters
19675	DMOJ WC '18 Contest 3 S4 - Holey Travels
19674	DMOJ WC '18 Contest 3 S3 - Counterpicking
19673	DMOJ WC '18 Contest 3 S2 - Gym Tour
19672	DMOJ WC '18 Contest 3 S1 - The Perfect Team
19671	DMOJ WC '18 Contest 3 J4 - Leveling Up
19670	DMOJ WC '18 Contest 3 J3 - R
19669	DMOJ WC '18 Contest 3 J2 - Net Weight
19668	DMOJ WC '18 Contest 3 J1 - An Honest Day's Work
19667	DMOJ WC '18 Contest 2 S4 - Car Convergence Chaos
19666	DMOJ WC '18 Contest 2 S3 - Multitasking
19665	DMOJ WC '18 Contest 2 S2 - Plutonium
19664	DMOJ WC '18 Contest 2 S1 - Laser Grid
19663	DMOJ WC '18 Contest 2 J4 - Ammunition
19662	DMOJ WC '18 Contest 2 J3 - Seeing Double
19661	DMOJ WC '18 Contest 2 J2 - This Message will Self-Destruct
19660	DMOJ WC '18 Contest 2 J1 - Alternate Access
19659	DMOJ WC '18 Contest 1 S4 - Bad Influence
19658	DMOJ WC '18 Contest 1 S3 - Reach for the Top
19657	DMOJ WC '18 Contest 1 S2 - Essay Generator
19656	DMOJ WC '18 Contest 1 S1 - Inspiration
19655	DMOJ WC '18 Contest 1 J4 - Germaphobia
19654	DMOJ WC '18 Contest 1 J3 - Comparing Grades
19653	DMOJ WC '18 Contest 1 J2 - Making the Cut
19652	DMOJ WC '18 Contest 1 J1 - Homework

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

19701

DMOJ WC '97 P1 - Searching Quickly

19700

DMOJ WC '96 P6 - Bases Multiplication

19699

DMOJ WC '96 P5 - Plentiful Paths

19698

DMOJ WC '96 P3 - Hidden Geography

19697

DMOJ WC '96 P2 - Row and Column

19696