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)
17051	DMOJ DMOPC '20 Contest 1 P5 - Victor Takes Over Canada
17050	DMOJ DMOPC '20 Contest 1 P4 - Victor Makes Bank
17049	DMOJ DMOPC '20 Contest 1 P3 - Victor's Algorithm
17048	DMOJ DMOPC '20 Contest 1 P2 - Victor's Moral Dilemma
17047	DMOJ DMOPC '20 Contest 1 P1 - Victor Gets Quizzed
17046	DMOJ DMOPC '19 Contest 7 P7 - Fluid Dynamics
17045	DMOJ DMOPC '19 Contest 7 P6 - Bob Equilibrium
17044	DMOJ DMOPC '19 Contest 7 P5 - Soriya's Programming Project
17043	DMOJ DMOPC '19 Contest 7 P4 - Bob and Continued Fractions
17042	DMOJ DMOPC '19 Contest 7 P3 - Tree Pruning
17041	DMOJ DMOPC '19 Contest 7 P2 - Dinner Party
17040	DMOJ DMOPC '19 Contest 7 P1 - Hydrocarbons
17039	DMOJ DMOPC '19 Contest 7 P0 - Contest Feedback
17038	DMOJ DMOPC '19 Contest 6 P6 - Math is Difficult
17037	DMOJ DMOPC '19 Contest 6 P5 - University Math
17036	DMOJ DMOPC '19 Contest 6 P4 - Grade 12 Math
17035	DMOJ DMOPC '19 Contest 6 P3 - Grade 11 Math
17034	DMOJ DMOPC '19 Contest 6 P2 - Grade 10 Math
17033	DMOJ DMOPC '19 Contest 6 P1 - Grade 9 Math
17032	DMOJ DMOPC '19 Contest 6 P0 - Trivial Math
17031	DMOJ DMOPC '19 Contest 5 P6 - Cecilia's Computational Crisis
17030	DMOJ DMOPC '19 Contest 5 P5 - Crazy Cyclic Coincidences
17029	DMOJ DMOPC '19 Contest 5 P4 - Cafeteria Confrontation Conundrum
17028	DMOJ DMOPC '19 Contest 5 P3 - Captivating Construction Challenge
17027	DMOJ DMOPC '19 Contest 5 P2 - Charlie's Crazy Conquest
17026	DMOJ DMOPC '19 Contest 5 P1 - Conspicuous Cryptic Checklist
17025	DMOJ DMOPC '19 Contest 5 P0 - Concurrent Competitor Counting
17024	DMOJ DMOPC '19 Contest 4 P6 - little_prince's Specialty Tea House
17023	DMOJ DMOPC '19 Contest 4 P5 - Financial Trouble
17022	DMOJ DMOPC '19 Contest 4 P4 - Math Class
17021	DMOJ DMOPC '19 Contest 4 P3 - Taking Cues
17020	DMOJ DMOPC '19 Contest 4 P2 - Pleasant Present
17019	DMOJ DMOPC '19 Contest 4 P1 - Valid Strings
17018	DMOJ DMOPC '19 Contest 4 P0 - Yikes
17017	DMOJ DMOPC '19 Contest 3 P6 - TST
17016	DMOJ DMOPC '19 Contest 3 P5 - Festival
17015	DMOJ DMOPC '19 Contest 3 P4 - Same Colour Leaves
17014	DMOJ DMOPC '19 Contest 3 P3 - Majority
17013	DMOJ DMOPC '19 Contest 3 P2 - Generating Names
17012	DMOJ DMOPC '19 Contest 3 P1 - Mode Finding
17011	DMOJ DMOPC '19 Contest 3 P0 - What is it?
17010	DMOJ DMOPC '19 Contest 2 P6 - Two Roots
17009	DMOJ DMOPC '19 Contest 2 P5 - Connections
17008	DMOJ DMOPC '19 Contest 2 P4 - A Greedy Problem
17007	DMOJ DMOPC '19 Contest 2 P3 - Selection
17006	DMOJ DMOPC '19 Contest 2 P2 - Squares
17005	DMOJ DMOPC '19 Contest 2 P1 - Box and Whiskers
17004	DMOJ DMOPC '19 Contest 2 P0 - Roller Coaster
17003	DMOJ DMOPC '19 Contest 1 P6 - Bob and Binary Strings
17002	DMOJ DMOPC '19 Contest 1 P5 - Broken String

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

17051

DMOJ DMOPC '20 Contest 1 P5 - Victor Takes Over Canada

17050

DMOJ DMOPC '20 Contest 1 P4 - Victor Makes Bank

17049

DMOJ DMOPC '20 Contest 1 P3 - Victor's Algorithm

17048

DMOJ DMOPC '20 Contest 1 P2 - Victor's Moral Dilemma

17047

DMOJ DMOPC '20 Contest 1 P1 - Victor Gets Quizzed

17046