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)
19551	DMOJ WC '15 Contest 2 J1 - A New Hope
19550	DMOJ WC '15 Contest 1 S4 - Chocolate Milk
19549	DMOJ WC '15 Contest 1 S3 - Contest Sites
19548	DMOJ WC '15 Contest 1 S2 - Wildcat Wildcards
19547	DMOJ WC '15 Contest 1 S1 - Woburn Workload
19546	DMOJ WC '15 Contest 1 J4 - Trip Budgeting
19545	DMOJ WC '15 Contest 1 J3 - Jazz Concert
19544	DMOJ WC '15 Contest 1 J2 - Grouping Recruits
19543	DMOJ WC '15 Contest 1 J1 - Do You Know Your Woburn Colours?
19542	DMOJ WC '07 P5 - BitStrings
19541	DMOJ WC '07 P4 - Drain Game
19540	DMOJ WC '07 P3 - Strategy Meeting
19539	DMOJ WC '02 Suicidal P5 - The Mines of Moria
19538	DMOJ WC '02 Suicidal P4 - The Spell of Lord Ruru
19537	DMOJ WC '02 Suicidal P3 - Evil Tasks
19536	DMOJ WC '02 Suicidal P2 - Klingon Roulette
19535	DMOJ WC '02 Suicidal P1 - Dark Lord
19534	DMOJ WC '02 P9 - A Nerd's Preparation
19533	DMOJ WC '02 P8 - Deploying Troops
19532	DMOJ WC '02 P7 - Old Macdonald's Farm
19531	DMOJ WC '02 P6 - Obstacles Galore
19530	DMOJ WC '02 P5 - Intercepted Cowmmunication
19529	DMOJ WC '02 P4 - It's Party Time
19528	DMOJ WC '02 P3 - The Big Book of Recipes
19527	DMOJ WC '02 P2 - Cow-bot
19526	DMOJ WC '02 P10 - The Final Battle
19525	DMOJ WC '02 P1 - A Planning Session
19524	DMOJ WC '01 Suicidal P6 - Blind Date
19523	DMOJ WC '01 Suicidal P5 - The Mole
19522	DMOJ WC '01 Suicidal P4 - Big Brother
19521	DMOJ WC '01 Suicidal P3 - Regis
19520	DMOJ WC '01 Suicidal P2 - Temptation Island
19519	DMOJ WC '01 Suicidal P1 - Survivor
19518	DMOJ WC '01 P9 - The Thirteenth Floor
19517	DMOJ WC '01 P8 - Time to Get Medieval
19516	DMOJ WC '01 P7 - The Sixth Sense
19515	DMOJ WC '01 P6 - Mission Impossible 3
19514	DMOJ WC '01 P5 - The Man With The Golden Eye
19513	DMOJ WC '01 P4 - Cool Runnings
19512	DMOJ WC '01 P3 - Back to the Future
19511	DMOJ WC '01 P2 - The Island Of Dr. Strangelove
19510	DMOJ WC '01 P1 - The Rock
19509	DMOJ Waterloo 2023 Winter E - Colourful Tree
19508	DMOJ Waterloo 2023 Winter D - Link-Cut Tree
19507	DMOJ Waterloo 2023 Winter C - Sandpile on Clique
19506	DMOJ Waterloo 2023 Winter B - Laser Trap
19505	DMOJ Waterloo 2023 Winter A - So I'll Max Out My Constructive Algorithm Skills
19504	DMOJ Waterloo 2022 Fall E - Water Flow
19503	DMOJ Waterloo 2022 Fall D - Course Selection
19502	DMOJ Waterloo 2022 Fall C - Squaring the Triangle

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

19551

DMOJ WC '15 Contest 2 J1 - A New Hope

19550

DMOJ WC '15 Contest 1 S4 - Chocolate Milk

19549

DMOJ WC '15 Contest 1 S3 - Contest Sites

19548

DMOJ WC '15 Contest 1 S2 - Wildcat Wildcards

19547

DMOJ WC '15 Contest 1 S1 - Woburn Workload

19546