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)
16901	DMOJ DMOPC '16 Contest 1 P6 - Phantom Child
16900	DMOJ DMOPC '16 Contest 1 P5 - Blood Tubes
16899	DMOJ DMOPC '16 Contest 1 P4 - Tree Appraisal
16898	DMOJ DMOPC '16 Contest 1 P3 - Shoe Shopping
16897	DMOJ DMOPC '16 Contest 1 P2 - Lines
16896	DMOJ DMOPC '16 Contest 1 P1 - A New Chapter
16895	DMOJ DMOPC '16 Contest 1 P0 - C.C. and Cheese-kun
16894	DMOJ DMOPC '15 Contest 7 P6 - A Very Very Original Problem
16893	DMOJ DMOPC '15 Contest 7 P5 - Ariadne's Thread
16892	DMOJ DMOPC '15 Contest 7 P4 - Magic
16891	DMOJ DMOPC '15 Contest 7 P3 - Harbourmaster
16890	DMOJ DMOPC '15 Contest 7 P2 - Not a Wall of Text
16889	DMOJ DMOPC '15 Contest 7 P1 - Kemonomimi Competition
16888	DMOJ DMOPC '15 Contest 6 P6 - Graf Zeppelin
16887	DMOJ DMOPC '15 Contest 6 P5 - A Classic Problem
16886	DMOJ DMOPC '15 Contest 6 P4 - Line Graph
16885	DMOJ DMOPC '15 Contest 6 P3 - Harvest
16884	DMOJ DMOPC '15 Contest 6 P2 - Tilt
16883	DMOJ DMOPC '15 Contest 6 P1 - Double XP Weekend
16882	DMOJ DMOPC '15 Contest 5 P6 - Event Horizon
16881	DMOJ DMOPC '15 Contest 5 P5 - World Line Convergence
16880	DMOJ DMOPC '15 Contest 5 P4 - Steins;Number
16879	DMOJ DMOPC '15 Contest 5 P3 - All Your Base
16878	DMOJ DMOPC '15 Contest 5 P2 - D-Mails
16877	DMOJ DMOPC '15 Contest 5 P1 - Gel Bananas
16876	DMOJ DMOPC '15 Contest 4 P6 - Alarms
16875	DMOJ DMOPC '15 Contest 4 P5 - Scribe
16874	DMOJ DMOPC '15 Contest 4 P4 - Great Sequence
16873	DMOJ DMOPC '15 Contest 4 P3 - Lethal
16872	DMOJ DMOPC '15 Contest 4 P2 - The Big Clock
16871	DMOJ DMOPC '15 Contest 4 P1 - Dictionary
16870	DMOJ DMOPC '15 Contest 3 P6 - Gala
16869	DMOJ DMOPC '15 Contest 3 P5 - Total Annihilation
16868	DMOJ DMOPC '15 Contest 3 P4 - Contagion
16867	DMOJ DMOPC '15 Contest 3 P3 - Dimethylbenzene
16866	DMOJ DMOPC '15 Contest 3 P2 - Cheesecake Distribution
16865	DMOJ DMOPC '15 Contest 3 P1 - Quality Scenes
16864	DMOJ DMOPC '15 Contest 2 P6 - Manhattan Magnets
16863	DMOJ DMOPC '15 Contest 2 P5 - Sysadmin
16862	DMOJ DMOPC '15 Contest 2 P4 - Personal Assistant
16861	DMOJ DMOPC '15 Contest 2 P3 - Origami
16860	DMOJ DMOPC '15 Contest 2 P2 - Admin War
16859	DMOJ DMOPC '15 Contest 2 P1 - Grumpy Dwarf
16858	DMOJ DMOPC '15 Contest 1 P6 - Lelei and Contest
16857	DMOJ DMOPC '15 Contest 1 P5 - Lelei and Dragon Scales
16856	DMOJ DMOPC '15 Contest 1 P4 - Itami and Candy
16855	DMOJ DMOPC '15 Contest 1 P3 - Itami and Cipher
16854	DMOJ DMOPC '15 Contest 1 P2 - Itami and Squad
16853	DMOJ DMOPC '15 Contest 1 P1 - Itami and Manga
16852	DMOJ DMOPC '14 Exam Time P6 - Math Homework

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

16901

DMOJ DMOPC '16 Contest 1 P6 - Phantom Child

16900

DMOJ DMOPC '16 Contest 1 P5 - Blood Tubes

16899

DMOJ DMOPC '16 Contest 1 P4 - Tree Appraisal

16898

DMOJ DMOPC '16 Contest 1 P3 - Shoe Shopping

16897

DMOJ DMOPC '16 Contest 1 P2 - Lines

16896