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)
18701	DMOJ NOI '16 P5 - Drinking Water
18700	DMOJ NOI '16 P4 - Interval
18699	DMOJ NOI '16 P3 - The Beauty of Cycles
18698	DMOJ NOI '16 P2 - Grid
18697	DMOJ NOI '16 P1 - Good Partitions
18696	DMOJ NOI '15 P6 - Farm
18695	DMOJ NOI '15 P5 - Cocktail Party
18694	DMOJ NOI '15 P4 - Homeric Epics
18693	DMOJ NOI '15 P3 - Sushi Dinner
18692	DMOJ NOI '15 P2 - Software Package Manager
18691	DMOJ NOI '15 P1 - Automated Program Analyzer
18690	DMOJ NOI '14 P6 - Ticket Purchase
18689	DMOJ NOI '14 P5 - Random Number Generator
18688	DMOJ NOI '14 P4 - Zoo
18687	DMOJ NOI '14 P3 - Deletion Game
18686	DMOJ NOI '14 P2 - Enchanted Forest
18685	DMOJ NOI '14 P1 - Getting-Up Syndrome
18684	DMOJ NOI '13 P6 - Fast Food Restaurant
18683	DMOJ NOI '13 P5 - Calligrapher
18682	DMOJ NOI '13 P4 - Matrix Game
18681	DMOJ NOI '13 P3 - Little Q's Training
18680	DMOJ NOI '13 P2 - Tree Count
18679	DMOJ NOI '13 P1 - Inner Product
18678	DMOJ NOI '12 P6 - Triple Town
18677	DMOJ NOI '12 P5 - Food Festival
18676	DMOJ NOI '12 P4 - Lost in the Park
18675	DMOJ NOI '12 P3 - Magic Chessboard
18674	DMOJ NOI '12 P2 - Highway Cycling
18673	DMOJ NOI '12 P1 - Random Number Generator
18672	DMOJ NOI '11 P6 - Bunny and Eggy's Game
18671	DMOJ NOI '11 P5 - NOI Carnival
18670	DMOJ NOI '11 P4 - Road Construction
18669	DMOJ NOI '11 P3 - Ali's Typewriter
18668	DMOJ NOI '11 P2 - Intelligent Car Racing
18667	DMOJ NOI '11 P1 - Rabbit Farming
18666	DMOJ NOI '10 P6 - Happily Growing
18665	DMOJ NOI '10 P5 - Route Planning
18664	DMOJ NOI '10 P4 - Flight Control
18663	DMOJ NOI '10 P3 - Altitude
18662	DMOJ NOI '10 P2 - Super Piano
18661	DMOJ NOI '10 P1 - Energy Harvesting
18660	DMOJ NOI '09 P6 - Tracing
18659	DMOJ NOI '09 P5 - Pipe Marbles
18658	DMOJ NOI '09 P4 - Plants vs. Zombies
18657	DMOJ NOI '09 P3 - Modified Treap
18656	DMOJ NOI '09 P2 - Little G the Poet
18655	DMOJ NOI '09 P1 - Transformed Sequence
18654	DMOJ NOI '08 P6 - Tournament Matching
18653	DMOJ NOI '08 P5 - Candy Rain
18652	DMOJ NOI '08 P4 - Olympic Logistics

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

18701

DMOJ NOI '16 P5 - Drinking Water

18700

DMOJ NOI '16 P4 - Interval

18699

DMOJ NOI '16 P3 - The Beauty of Cycles

18698

DMOJ NOI '16 P2 - Grid

18697

DMOJ NOI '16 P1 - Good Partitions

18696