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)
17951	DMOJ HCI '16 - Stacker
17950	DMOJ HCI '16 - Sentence Checker
17949	DMOJ HCI '16 - Redstone Repeaters
17948	DMOJ HCI '16 - Cheapest Operation Ever
17947	DMOJ HCI '16 - Poké Problem
17946	DMOJ HCI '16 - Pi Digits
17945	DMOJ HCI '16 - Penguin Food
17944	DMOJ HCI '16 - Oversleep
17943	DMOJ HCI '16 - Moana
17942	DMOJ HCI '16 - lvm_ex
17941	DMOJ HCI '16 - Lamppost
17940	DMOJ HCI '16 - Jumping
17939	DMOJ HCI '16 - HelloWorld_ex
17938	DMOJ HCI '16 - Hearing
17937	DMOJ HCI '16 - Gifts
17936	DMOJ HCI '16 - Foodie
17935	DMOJ HCI '16 - Danger Room
17934	DMOJ HCI '16 - Computation
17933	DMOJ HCI '16 - Cheese
17932	DMOJ HCI '16 - Serial Killer
17931	DMOJ HCI '16 - Boxception
17930	DMOJ HCI '16 - BinaryBomb
17929	DMOJ Hashing
17928	DMOJ Hard Question
17927	DMOJ Halloween '14 P4 - Fox Girls
17926	DMOJ Halloween '14 P3 - Dog Girls
17925	DMOJ Halloween '14 P2 - Cat Girls
17924	DMOJ Halloween '14 P1 - Rabbit Girls
17923	DMOJ Grid 1.5
17922	DMOJ Hailstone Numbers
17921	DMOJ Hardcore Grinding
17920	DMOJ Grid 3
17919	DMOJ A Greedy Problem
17918	DMOJ Graph Contest 3 P3 - Cable TV
17917	DMOJ Graph Contest 3 P2 - Shortest Path
17916	DMOJ Graph Contest 3 P1 - Travelling Salesmen
17915	DMOJ Graph Contest 2 P3 - Trees
17914	DMOJ Graph Contest 2 P2 - Directed Acyclic Graph
17913	DMOJ Graph Contest 2 P1 - Connected Components
17912	DMOJ Graph Contest 1 P3 - Counting Cycles
17911	DMOJ Graph Contest 1 P2 - Shortest Path
17910	DMOJ Graph Contest 1 P1 - Counting Paths
17909	DMOJ Breaking the Friend Chain
17908	DMOJ King Graff's Trip
17907	DMOJ King Graff's Tolls
17906	DMOJ King Graff's Defense
17905	DMOJ Good Sets
17904	DMOJ Good Celebration
17903	DMOJ Good Inflation
17902	DMOJ Good Aim

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

17951

DMOJ HCI '16 - Stacker

17950

DMOJ HCI '16 - Sentence Checker

17949

DMOJ HCI '16 - Redstone Repeaters

17948

DMOJ HCI '16 - Cheapest Operation Ever

17947

DMOJ HCI '16 - Poké Problem

17946