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)
18301	DMOJ MALD Contest 1 P1 - Scratch Cat and DDoS
18300	DMOJ Magic Sequence
18299	DMOJ Magic Maze
18298	DMOJ Magic Bits
18297	DMOJ Max's Anger Contest Series 2 P5 - Job Anger
18296	DMOJ Max's Anger Contest Series 2 P4 - Number Anger
18295	DMOJ Max's Anger Contest Series 2 P3 - Array Anger
18294	DMOJ Max's Anger Contest Series 2 P2 - Password Anger
18293	DMOJ Max's Anger Contest Series 2 P1 - Directed Anger
18292	DMOJ Max's Anger Contest Series 1 P5 - Slacking Subsequences
18291	DMOJ Max's Anger Contest Series 1 P4 - Greedily Gamboling (Hard Version)
18290	DMOJ Max's Anger Contest Series 1 P4 - Greedily Gamboling
18289	DMOJ Max's Anger Contest Series 1 P3 - Divide and Connor
18288	DMOJ Max's Anger Contest Series 1 P2 - Wesley's Anger Contest 7 P1 - Enraged
18287	DMOJ Max's Anger Contest Series 1 P1 - Hunger Bar
18286	DMOJ Guess the Sequence
18285	DMOJ Willie's Subtree
18284	DMOJ Love Evenness
18283	DMOJ LKP '18 Contest 2 P6 - Reconstruction
18282	DMOJ LKP '18 Contest 2 P5 - Political Instability
18281	DMOJ LKP '18 Contest 2 P4 - The Zagonetka Machine
18280	DMOJ LKP '18 Contest 2 P3 - Non-strategic Bombing
18279	DMOJ LKP '18 Contest 2 P2 - Secret Signal
18278	DMOJ LKP '18 Contest 2 P1 - Food Lines
18277	DMOJ LKP '18 Contest 1 P6 - The Great Fire of Köres
18276	DMOJ LKP '18 Contest 1 P5 - The Treaty of Wellacotia
18275	DMOJ LKP '18 Contest 1 P4 - Fun in Föràg
18274	DMOJ LKP '18 Contest 1 P3 - Polynomial Madness
18273	DMOJ LKP '18 Contest 1 P2 - Observing Frogs
18272	DMOJ LKP '18 Contest 1 P1 - World Trade Foundation
18271	DMOJ Literature Club
18270	DMOJ Longest Increasing Subsequence
18269	DMOJ Linked List
18268	DMOJ Lil' Jami
18267	DMOJ Liars
18266	DMOJ Lyndon's Golf Contest 1 P9 - Fibonacci: The Finale
18265	DMOJ Lyndon's Golf Contest 1 P8 - Beautiful Brackets
18264	DMOJ Lyndon's Golf Contest 1 P7 - Fun Factoring
18263	DMOJ Lyndon's Golf Contest 1 P6 - Alphanumeric Perl
18262	DMOJ Lyndon's Golf Contest 1 P5 - Basic Triangle
18261	DMOJ Lyndon's Golf Contest 1 P4 - Symbolic Ruby
18260	DMOJ Lyndon's Golf Contest 1 P3 - Boolean (Buffed)
18259	DMOJ Lyndon's Golf Contest 1 P2 - A Cube Problem
18258	DMOJ Lyndon's Golf Contest 1 P1 - As Easy As ABC
18257	DMOJ Levve Loves Segment Trees
18256	DMOJ Lemon Tree
18255	DMOJ Lemon Game
18254	DMOJ Lemon
18253	DMOJ Lego
18252	DMOJ Link Cut Tree

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

18301

DMOJ MALD Contest 1 P1 - Scratch Cat and DDoS

18300

DMOJ Magic Sequence

18299

DMOJ Magic Maze

18298

DMOJ Magic Bits

18297

DMOJ Max's Anger Contest Series 2 P5 - Job Anger

18296