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)
15901	DMOJ CCO '18 P6 - Flop Sorting
15900	DMOJ CCO '18 P5 - Boring Lectures (Online Version)
15899	DMOJ CCO '18 P5 - Boring Lectures
15898	DMOJ CCO '18 P4 - Gradient Descent
15897	DMOJ CCO '18 P3 - Fun Palace
15896	DMOJ CCO '18 P2 - Wrong Answer
15895	DMOJ CCO '18 P1 - Geese vs. Hawks
15894	DMOJ CCO '17 P6 - Shifty Grid
15893	DMOJ CCO '17 P5 - Professional Network
15892	DMOJ CCO '17 P4 - Rainfall Storage
15891	DMOJ CCO '17 P3 - Vera and Modern Art
15890	DMOJ CCO '17 P2 - Cartesian Conquest
15889	DMOJ CCO '17 P1 - Vera and Trail Building
15888	DMOJ CCO '16 P6 - Pirates
15887	DMOJ CCO '16 P5 - Zombie Apocalypse
15886	DMOJ CCO '16 P4 - O Canada
15885	DMOJ CCO '16 P3 - Legends
15884	DMOJ CCO '16 P2 - Splitting Hares
15883	DMOJ CCO '16 P1 - Field Trip
15882	DMOJ CCO '15 P6 - Eggscavation
15881	DMOJ CCO '15 P5 - Timpanist
15880	DMOJ CCO '15 P4 - Cars on Ice
15879	DMOJ CCO '15 P3 - Solar Flight
15878	DMOJ CCO '15 P2 - Artskjid
15877	DMOJ CCO '15 P1 - Hungry Fox
15876	DMOJ CCO '14 P6 - Gates
15875	DMOJ CCO '14 P5 - Early Exam Evacuation
15874	DMOJ CCO '14 P4 - Where's That Fuel?
15873	DMOJ CCO '14 P3 - Werewolf
15872	DMOJ CCO '14 P2 - King Gruff
15871	DMOJ CCO '14 P1 - Troyangles
15870	DMOJ CCO '13 P6 - Repetitivity
15869	DMOJ CCO '13 P5 - Transforming Comets
15868	DMOJ CCO '13 P4 - A Romantic Movie Outing
15867	DMOJ CCO '13 P3 - LHC
15866	DMOJ CCO '13 P2 - Tourney
15865	DMOJ CCO '13 P1 - All Your Base Belong to Palindromes
15864	DMOJ CCO '12 P6 - The Winds Of War
15863	DMOJ CCO '12 P5 - Sample Size
15862	DMOJ CCO '12 P4 - Editor Distance
15861	DMOJ CCO '12 P3 - Mhocskian Languages
15860	DMOJ CCO '12 P2 - The Hungary Games
15859	DMOJ CCO '12 P1 - Choose Your Own Arithmetic
15858	DMOJ CCO '11 P6 - Biggest (Zero Carbon) Footprint
15857	DMOJ CCO '11 P5 - Fixing Disks
15856	DMOJ CCO '11 P4 - Reorganization
15855	DMOJ CCO '11 P3 - Spies Like Us
15854	DMOJ CCO '11 P2 - Vampire Tunnels
15853	DMOJ CCO '11 P1 - Putnam
15852	DMOJ CCO '10 P6 - Shuffle

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

15901

DMOJ CCO '18 P6 - Flop Sorting

15900

DMOJ CCO '18 P5 - Boring Lectures (Online Version)

15899

DMOJ CCO '18 P5 - Boring Lectures

15898

DMOJ CCO '18 P4 - Gradient Descent

15897

DMOJ CCO '18 P3 - Fun Palace

15896