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)
8101	Codeforces 1736A: Make A Equal to B
8100	Codeforces 1735F: Pebbles and Beads
8099	Codeforces 1735E: House Planning
8098	Codeforces 1735D: Meta-set
8097	Codeforces 1735C: Phase Shift
8096	Codeforces 1735B: Tea with Tangerines
8095	Codeforces 1735A: Working Week
8094	Codeforces 1734F: Zeros and Ones
8093	Codeforces 1734E: Rectangular Congruence
8092	Codeforces 1734D: Slime Escape
8091	Codeforces 1734C: Removing Smallest Multiples
8090	Codeforces 1734B: Bright, Nice, Brilliant
8089	Codeforces 1734A: Select Three Sticks
8088	Codeforces 1733E: Conveyor
8087	Codeforces 1733D2: Zero-One (Hard Version)
8086	Codeforces 1733D1: Zero-One (Easy Version)
8085	Codeforces 1733C: Parity Shuffle Sorting
8084	Codeforces 1733B: Rule of League
8083	Codeforces 1733A: Consecutive Sum
8082	Codeforces 1732E: Location
8081	Codeforces 1732D2: Balance (Hard version)
8080	Codeforces 1732D1: Balance (Easy version)
8079	Codeforces 1732C2: Sheikh (Hard Version)
8078	Codeforces 1732C1: Sheikh (Easy version)
8077	Codeforces 1732B: Ugu
8076	Codeforces 1732A: Bestie
8075	Codeforces 1731F: Function Sum
8074	Codeforces 1731E: Graph Cost
8073	Codeforces 1731D: Valiant's New Map
8072	Codeforces 1731C: Even Subarrays
8071	Codeforces 1731B: Kill Demodogs
8070	Codeforces 1731A: Joey Takes Money
8069	Codeforces 1730F: Almost Sorted
8068	Codeforces 1730E: Maximums and Minimums
8067	Codeforces 1730D: Prefixes and Suffixes
8066	Codeforces 1730C: Minimum Notation
8065	Codeforces 1730B: Meeting on the Line
8064	Codeforces 1730A: Planets
8063	Codeforces 1729G: Cut Substrings
8062	Codeforces 1729F: Kirei and the Linear Function
8061	Codeforces 1729E: Guess the Cycle Size
8060	Codeforces 1729D: Friends and the Restaurant
8059	Codeforces 1729C: Jumping on Tiles
8058	Codeforces 1729B: Decode String
8057	Codeforces 1729A: Two Elevators
8056	Codeforces 1728G: Illumination
8055	Codeforces 1728F: Fishermen
8054	Codeforces 1728E: Red-Black Pepper
8053	Codeforces 1728D: Letter Picking
8052	Codeforces 1728C: Digital Logarithm

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

8101

Codeforces 1736A: Make A Equal to B

8100

Codeforces 1735F: Pebbles and Beads

8099

Codeforces 1735E: House Planning

8098

Codeforces 1735D: Meta-set

8097

Codeforces 1735C: Phase Shift

8096