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)
17851	DMOJ GFSSOC '15 Fall S5 - Raider
17850	DMOJ GFSSOC '15 Fall S4 - Mostly Talking
17849	DMOJ GFSSOC '15 Fall S3 - System(0);
17848	DMOJ GFSSOC '15 Fall S2 - Hearth
17847	DMOJ GFSSOC '15 Fall S1 - T-Shirts
17846	DMOJ GFSSOC '15 Fall J5 - Nightmare-a-thon
17845	DMOJ GFSSOC '15 Fall J4 - Marathon
17844	DMOJ GFSSOC '15 Fall J3 - Equation Solver
17843	DMOJ GFSSOC '15 Fall J2 - Fizz Fuzz
17842	DMOJ GFSSOC '15 Fall J1 - CodeFights
17841	DMOJ GFSSOC '14 Winter S5 - Stardust Snow
17840	DMOJ GFSSOC '14 Winter S4 - Stalactites
17839	DMOJ GFSSOC '14 Winter S3 - Hide n Seek
17838	DMOJ GFSSOC '14 Winter S2 - Speech
17837	DMOJ GFSSOC '14 Winter S1 - Friendship is a number
17836	DMOJ GFSSOC '14 Winter J5 - Pursuit of Knowledge
17835	DMOJ GFSSOC '14 Winter J4 - Tic Tac Moe!
17834	DMOJ GFSSOC '14 Winter J3 - Waiting
17833	DMOJ GFSSOC '14 Winter J2 - Wow much parking lot
17832	DMOJ GFSSOC '14 Winter J1 - Flying Plushies
17831	DMOJ GFSSOC '17 S4 - First Ace
17830	DMOJ GFSSOC '17 S3 - Zhany Zhanbies
17829	DMOJ GFSSOC '17 S2 - Ace is Base
17828	DMOJ GFSSOC '17 S1 - Path to Waterloo
17827	DMOJ GFSSOC '17 J5 - Choosing Extracurriculars
17826	DMOJ GFSSOC '17 J4 - Top Courses
17825	DMOJ GFSSOC '17 J3 - AIF Essay
17824	DMOJ GFSSOC '17 J2 - Admission Average
17823	DMOJ GFSSOC '17 J1 - Ramen and Studying
17822	DMOJ GFSS Christmas Challenge P4 - Coal Counting
17821	DMOJ GFSS Christmas Challenge P3 - Candy Distribution
17820	DMOJ GFSS Christmas Challenge P2 - Height Inspection
17819	DMOJ GFSS Christmas Challenge P1 - Arithmetic Operators
17818	DMOJ Troubling Triangles
17817	DMOJ Geography Class
17816	DMOJ Google Code Jam '22 Round 3 Problem C - Mascot Maze
17815	DMOJ Google Code Jam '22 Round 3 Problem B - Duck, Duck, Geese
17814	DMOJ Google Code Jam '22 Round 2 Problem D - I, O Bot
17813	DMOJ Google Code Jam '22 Round 2 Problem C - Saving the Jelly
17812	DMOJ Google Code Jam '22 Round 2 Problem B - Pixelated Circle
17811	DMOJ Google Code Jam '22 Round 2 Problem A - Spiraling Into Control
17810	DMOJ Google Code Jam '22 Round 1C Problem C - Intranets
17809	DMOJ Google Code Jam '22 Round 1C Problem B - Squary
17808	DMOJ Google Code Jam '22 Round 1C Problem A - Letter Blocks
17807	DMOJ Google Code Jam '22 Round 1B Problem B - Controlled Inflation
17806	DMOJ Google Code Jam '22 Round 1B Problem A - Pancake Deque
17805	DMOJ Google Code Jam '22 Round 1A Problem C - Weightlifting
17804	DMOJ Google Code Jam '22 Round 1A Problem A - Double or One Thing
17803	DMOJ Google Code Jam '22 Qualification Round Problem E - Twisty Little Passages
17802	DMOJ Google Code Jam '22 Qualification Round Problem D - Chain Reactions

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

17851

DMOJ GFSSOC '15 Fall S5 - Raider

17850

DMOJ GFSSOC '15 Fall S4 - Mostly Talking

17849

DMOJ GFSSOC '15 Fall S3 - System(0);

17848

DMOJ GFSSOC '15 Fall S2 - Hearth

17847

DMOJ GFSSOC '15 Fall S1 - T-Shirts

17846