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)
19201	DMOJ TLE '16 Contest 6 (Mock CCC) J1 - Paper Printing
19200	DMOJ TLE '16 Contest 5 P5 - Better Ranking List
19199	DMOJ TLE '16 Contest 5 P4 - Engineering Test
19198	DMOJ TLE '16 Contest 5 P3 - Flight Exam
19197	DMOJ TLE '16 Contest 5 P2 - Playing Piano
19196	DMOJ TLE '16 Contest 5 P1 - English Proficiency Exam
19195	DMOJ TLE '16 Contest 4 P6 - Essay Writing
19194	DMOJ TLE '16 Contest 4 P5 - Buying Gifts
19193	DMOJ TLE '16 Contest 4 P4 - Christmas Tree Building
19192	DMOJ TLE '16 Contest 4 P3 - Cubes
19191	DMOJ TLE '16 Contest 4 P2 - Shepherding
19190	DMOJ TLE '16 Contest 4 P1 - Stack of Presents
19189	DMOJ TLE '16 Contest 3 P6 - Space Invaders
19188	DMOJ TLE '16 Contest 3 P5 - LAN Party
19187	DMOJ TLE '16 Contest 3 P4 - Gaussian Elimination
19186	DMOJ TLE '16 Contest 3 P3 - Mysterious Package
19185	DMOJ TLE '16 Contest 3 P2 - In Remembrance
19184	DMOJ TLE '16 Contest 3 P1 - Hapax Legomenon
19183	DMOJ TLE '16 Contest 2 P6 - The Great Search
19182	DMOJ TLE '16 Contest 2 P5 - Thanksgiving Feast
19181	DMOJ TLE '16 Contest 2 P4 - Harambe's Noble Quest
19180	DMOJ TLE '16 Contest 2 P3 - Fax's Thanksgiving Dinner
19179	DMOJ TLE '16 Contest 2 P2 - Packing Microwaves
19178	DMOJ TLE '16 Contest 2 P1 - In Debt
19177	DMOJ TLE '16 Contest 1 P6 - A Very Normal Test
19176	DMOJ TLE '16 Contest 1 P5 - Battle Plan
19175	DMOJ TLE '16 Contest 1 P4 - Microwaves Again!
19174	DMOJ TLE '16 Contest 1 P3 - Joey and Chemistry
19173	DMOJ TLE '16 Contest 1 P2 - Heavy-Light Decomposition
19172	DMOJ TLE '16 Contest 1 P1 - Buying Paper
19171	DMOJ TLE '15 P6 - Rock, Paper, Scissors
19170	DMOJ TLE '15 P5 - Prefix Sum Array
19169	DMOJ TLE '15 P4 - Olympiads Homework
19168	DMOJ TLE '15 P3 - Poetry
19167	DMOJ TLE '15 P2 - Microwaves
19166	DMOJ TLE '15 P1 - Power Rankings
19165	DMOJ Thog's Fortnite 2
19164	DMOJ THICC '17 P6 - Tunnels
19163	DMOJ THICC '17 P5 - Smarties
19162	DMOJ THICC '17 P4 - Kenta's Neural Networks
19161	DMOJ THICC '17 P3 - The God of Death
19160	DMOJ THICC '17 P2 - Molly and Product
19159	DMOJ THICC '17 P1 - Carol's Carnivorous Plants
19158	DMOJ The Return of A Plus B
19157	DMOJ TTC
19156	DMOJ Budget
19155	DMOJ Economy
19154	DMOJ Ternary Search Tree
19153	DMOJ Teleportation Tangle
19152	DMOJ Triway Cup '19 Summer Junior P3 - Thor Goes for the Papaya

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

19201

DMOJ TLE '16 Contest 6 (Mock CCC) J1 - Paper Printing

19200

DMOJ TLE '16 Contest 5 P5 - Better Ranking List

19199

DMOJ TLE '16 Contest 5 P4 - Engineering Test

19198

DMOJ TLE '16 Contest 5 P3 - Flight Exam

19197

DMOJ TLE '16 Contest 5 P2 - Playing Piano

19196