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)
15801	DMOJ CCO '02 P3 - Return To Blind Man's Bluff
15800	DMOJ CCO '02 P2 - Game Show Math
15799	DMOJ CCO '02 P1 - Spam
15798	DMOJ CCO '01 P6 - Election Night
15797	DMOJ CCO '01 P5 - Fast Food
15796	DMOJ CCO '01 P4 - Breaking Level (Standard I/O)
15795	DMOJ CCO '01 P3 - Partitions
15794	DMOJ CCO '01 P2 - Coke or Chocolate Milk
15793	DMOJ CCO '01 P1 - The Monkey Dance
15792	DMOJ CCO '00 P6 - Extension Cords
15791	DMOJ CCO '00 P5 - Millikan's Oil Droplet Experiment
15790	DMOJ CCO '00 P4 - Packet Routing
15789	DMOJ CCO '00 P3 - The Game Of 31
15788	DMOJ CCO '00 P2 - Ransom Note
15787	DMOJ CCO '00 P1 - Subsets
15786	DMOJ Coin Change
15785	DMOJ CCCJQR P5
15784	DMOJ CCCJQR P4
15783	DMOJ CCCJQR P3
15782	DMOJ CCCJQR P2
15781	DMOJ CCCJQR P1
15780	DMOJ CCC '99 S5 - Letter Arithmetic
15779	DMOJ CCC '99 S4 - A Knightly Pursuit
15778	DMOJ CCC '99 S3 - Divided Fractals
15777	DMOJ CCC '99 S2 - Year 2000
15776	DMOJ CCC '99 S1 - Card Game
15775	DMOJ CCC '98 S5 - Mountain Passage
15774	DMOJ CCC '98 S4 - Lottery
15773	DMOJ CCC '98 S3 - Mars Rover
15772	DMOJ CCC '98 S2 - Cross Number Puzzle
15771	DMOJ CCC '98 S1 - Censor
15770	DMOJ CCC '97 S5 - Long Division
15769	DMOJ CCC '97 S4 - Dynamic Dictionary Coding
15768	DMOJ CCC '97 S3 - Double Knockout Competition
15767	DMOJ CCC '97 S2 - Nasty Numbers
15766	DMOJ CCC '97 S1 - Sentences
15765	DMOJ CCC '96 S5 - Maximum Distance
15764	DMOJ CCC '96 S4 - When in Rome
15763	DMOJ CCC '96 S3 - Pattern Generator
15762	DMOJ CCC '96 S2 - Divisibility by 11
15761	DMOJ CCC '96 S1 - Deficient, Perfect, and Abundant
15760	DMOJ CCC '23 S5 - The Filter
15759	DMOJ CCC '23 S4 - Minimum Cost Roads
15758	DMOJ CCC '23 S3 - Palindromic Poster
15757	DMOJ CCC '23 S2 - Symmetric Mountains
15756	DMOJ CCC '23 S1 - Trianglane
15755	DMOJ CCC '23 J5 - CCC Word Hunt
15754	DMOJ CCC '23 J3 - Special Event
15753	DMOJ CCC '23 J2 - Chili Peppers
15752	DMOJ CCC '23 J1 - Deliv-e-droid

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

15801

DMOJ CCO '02 P3 - Return To Blind Man's Bluff

15800

DMOJ CCO '02 P2 - Game Show Math

15799

DMOJ CCO '02 P1 - Spam

15798

DMOJ CCO '01 P6 - Election Night

15797

DMOJ CCO '01 P5 - Fast Food

15796