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)
16051	DMOJ COCI '06 Contest 2 #4 Sjecišta
16050	DMOJ COCI '06 Contest 2 #3 Kolone
16049	DMOJ COCI '06 Contest 2 #2 ABC
16048	DMOJ COCI '06 Contest 2 #1 R2
16047	DMOJ COCI '06 Contest 1 #6 Debug
16046	DMOJ COCI '06 Contest 1 #5 Bond
16045	DMOJ COCI '06 Contest 1 #4 Slikar
16044	DMOJ COCI '06 Contest 1 #3 Okviri
16043	DMOJ COCI '06 Contest 1 #2 Herman
16042	DMOJ COCI '06 Contest 1 #1 Modulo
16041	DMOJ Revenge of the Clocks
16040	DMOJ Clique
16039	DMOJ Rock Climbing
16038	DMOJ Chores
16037	DMOJ Chocolate Bar
16036	DMOJ Cheerio Contest 3 P5 - Train Network
16035	DMOJ Cheerio Contest 3 P4 - Bit Flips
16034	DMOJ Cheerio Contest 3 P3 - Everything Array
16033	DMOJ Cheerio Contest 3 P2 - Double-O-Seven
16032	DMOJ Cheerio Contest 3 P1 - Wet Floor
16031	DMOJ Cheerio Contest 2 P5 - Subsequence Queries
16030	DMOJ Cheerio Contest 2 P4 - Modulus Finding
16029	DMOJ Cheerio Contest 2 P3 - Digits
16028	DMOJ Cheerio Contest 2 P2 - Cereal Boxes
16027	DMOJ Cheerio Contest 2 P1 - Cow Pasture
16026	DMOJ Cheerio Contest 1 S5 - Coin Game
16025	DMOJ Cheerio Contest 1 S4 - Mystery Boxes
16024	DMOJ Cheerio Contest 1 S3 - Stock Trading
16023	DMOJ Cheerio Contest 1 S2 - School Expansion
16022	DMOJ Cheerio Contest 1 S1/J4 - Going to School
16021	DMOJ Cheerio Contest 1 J5 - Arithmetic Sequence
16020	DMOJ Cheerio Contest 1 J3 - Festival
16019	DMOJ Cheerio Contest 1 J2 - Phys Ed Class
16018	DMOJ Cheerio Contest 1 J1 - Pronounceable Words
16017	DMOJ Checker Number
16016	DMOJ Checkerboard Summation (Hard)
16015	DMOJ Checkerboard Summation (Easy)
16014	DMOJ Checkerboard Cut
16013	DMOJ Allen's Segments
16012	DMOJ Champion Contest
16011	DMOJ Expensive Chair Stacking
16010	DMOJ CERC '07 E - Gates of Logic
16009	DMOJ CERC '07 B - Strange Billboard
16008	DMOJ CERC '00 H - Hotline
16007	DMOJ CEOI '22 P6 - Parking
16006	DMOJ CEOI '22 P5 - Measures
16005	DMOJ CEOI '22 P4 - Drawing
16004	DMOJ CEOI '22 P3 - Prize
16003	DMOJ CEOI '22 P2 - Homework
16002	DMOJ CEOI '22 P1 - Abracadabra

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

16051

DMOJ COCI '06 Contest 2 #4 Sjecišta

16050

DMOJ COCI '06 Contest 2 #3 Kolone

16049

DMOJ COCI '06 Contest 2 #2 ABC

16048

DMOJ COCI '06 Contest 2 #1 R2

16047

DMOJ COCI '06 Contest 1 #6 Debug

16046