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)
18051	DMOJ IOI '10 P1 - Cluedo
18050	DMOJ IOI '09 Practice Task 3 - Museum
18049	DMOJ IOI '09 P8 - Salesman
18048	DMOJ IOI '09 P7 - Regions
18047	DMOJ IOI '09 P6 - Mecho
18046	DMOJ IOI '09 P5 - Garage
18045	DMOJ IOI '09 P4 - Raisins
18044	DMOJ IOI '09 P3 - POI
18043	DMOJ IOI '09 P2 - Hiring
18042	DMOJ IOI '09 P1 - Archery
18041	DMOJ IOI '08 P6 - Pyramid Base
18040	DMOJ IOI '08 P4 - Teleporters
18039	DMOJ IOI '08 P3 - Fish
18038	DMOJ IOI '08 P2 - Islands
18037	DMOJ IOI '08 P1 - Type Printer
18036	DMOJ IOI '07 P6 - Training
18035	DMOJ IOI '07 P5 - Pairs
18034	DMOJ IOI '07 P4 - Miners
18033	DMOJ IOI '07 P3 - Sails
18032	DMOJ IOI '07 P2 - Flood
18031	DMOJ IOI '07 P1 - Aliens
18030	DMOJ IOI '06 P4 - The Valley of Mexico
18029	DMOJ IOI '06 P2 - Pyramid
18028	DMOJ IOI '06 P1 - Deciphering the Mayan Writing
18027	DMOJ IOI '05 Practice Task 3 - Polish Flag
18026	DMOJ IOI '05 P6 - Rivers
18025	DMOJ IOI '05 P4 - Birthday
18024	DMOJ IOI '05 P3 - Mountain
18023	DMOJ IOI '05 P2 - Mean Sequence
18022	DMOJ IOI '05 P1 - Garden
18021	DMOJ IOI '04 P6 - Empodia
18020	DMOJ IOI '04 P5 - Farmer
18019	DMOJ IOI '04 P4 - Phidias
18018	DMOJ IOI '04 P2 - Hermes (Hard)
18017	DMOJ IOI '04 P2 - Hermes
18016	DMOJ IOI '04 P1 - Artemis
18015	DMOJ IOI '03 Practice Task 1 - Balancing Act
18014	DMOJ IOI '03 P6 - Seeing the Boundary
18013	DMOJ IOI '03 P5 - Amazing Robots
18012	DMOJ IOI '03 P2 - Comparing Code
18011	DMOJ IOI '02 P5 - Bus Terminals
18010	DMOJ IOI '02 P4 - Batch Scheduling
18009	DMOJ IOI '02 P2 - Utopia Divided
18008	DMOJ IOI '02 P1 - The Troublesome Frog
18007	DMOJ IOI '01 P6 - Depot
18006	DMOJ IOI '01 P3 - Twofive
18005	DMOJ IOI '01 P2 - Ioiwari Game
18004	DMOJ IOI '01 P1 - Mobile Phones
18003	DMOJ IOI '00 P6 - Building with Blocks
18002	DMOJ IOI '00 P5 - Post Office

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

18051

DMOJ IOI '10 P1 - Cluedo

18050

DMOJ IOI '09 Practice Task 3 - Museum

18049

DMOJ IOI '09 P8 - Salesman

18048

DMOJ IOI '09 P7 - Regions

18047

DMOJ IOI '09 P6 - Mecho

18046