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)
17001	DMOJ DMOPC '19 Contest 1 P4 - A Strange Graph
17000	DMOJ DMOPC '19 Contest 1 P3 - Simple Math
16999	DMOJ DMOPC '19 Contest 1 P2 - Good Writing
16998	DMOJ DMOPC '19 Contest 1 P1 - Test Scores
16997	DMOJ DMOPC '19 Contest 1 P0 - Range Finding
16996	DMOJ DMOPC '18 Contest 6 P5 - Quadrat Sampling
16995	DMOJ DMOPC '18 Contest 6 P4 - Tank
16994	DMOJ DMOPC '18 Contest 6 P3 - Wish Upon a Star
16993	DMOJ DMOPC '18 Contest 6 P2 - Enantiomers
16992	DMOJ DMOPC '18 Contest 6 P1 - DNA or RNA?
16991	DMOJ DMOPC '18 Contest 6 P0 - SQL Queries
16990	DMOJ DMOPC '18 Contest 5 P6 - An XOR Problem
16989	DMOJ DMOPC '18 Contest 5 P5 - A Hat Problem
16988	DMOJ DMOPC '18 Contest 5 P4 - An Art Gallery Problem
16987	DMOJ DMOPC '18 Contest 5 P3 - A Familiar Problem
16986	DMOJ DMOPC '18 Contest 5 P2 - A Photography Problem
16985	DMOJ DMOPC '18 Contest 5 P1 - A Painting Problem
16984	DMOJ DMOPC '18 Contest 5 P0 - A Digital Art Problem
16983	DMOJ DMOPC '18 Contest 4 P6 - Dr. Henri and Resistor Chains
16982	DMOJ DMOPC '18 Contest 4 P5 - Dr. Henri and Wormholes
16981	DMOJ DMOPC '18 Contest 4 P4 - Dr. Henri and Lab Data
16980	DMOJ DMOPC '18 Contest 4 P3 - Dr. Henri and Ionization
16979	DMOJ DMOPC '18 Contest 4 P2 - Dr. Henri and Responsibility
16978	DMOJ DMOPC '18 Contest 4 P1 - Dr. Henri and Differential Photometry
16977	DMOJ DMOPC '18 Contest 4 P0 - Dr. Henri and Seeing Stars
16976	DMOJ DMOPC '18 Contest 3 P6 - Bob and Suffering
16975	DMOJ DMOPC '18 Contest 3 P5 - Bob and Physics Class
16974	DMOJ DMOPC '18 Contest 3 P4 - Bob and English Class
16973	DMOJ DMOPC '18 Contest 3 P3 - Bob and Math Class
16972	DMOJ DMOPC '18 Contest 3 P2 - Bob and French Class
16971	DMOJ DMOPC '18 Contest 3 P1 - Bob and Music Class
16970	DMOJ DMOPC '18 Contest 3 P0 - Bob and ICS Class
16969	DMOJ DMOPC '18 Contest 2 P6 - Standing Ovation (Hard Version)
16968	DMOJ DMOPC '18 Contest 2 P6 - Standing Ovation
16967	DMOJ DMOPC '18 Contest 2 P5 - Another Sequence Problem
16966	DMOJ DMOPC '18 Contest 2 P4 - Damage Output
16965	DMOJ DMOPC '18 Contest 2 P3 - Thanksgiving Feast
16964	DMOJ DMOPC '18 Contest 2 P2 - Booster Cushions
16963	DMOJ DMOPC '18 Contest 2 P1 - Pumpkin Patches
16962	DMOJ DMOPC '18 Contest 2 P0 - Mimi and Video Games
16961	DMOJ DMOPC '18 Contest 1 P6 - Sorting
16960	DMOJ DMOPC '18 Contest 1 P5 - Sorting
16959	DMOJ DMOPC '18 Contest 1 P4 - Sorting
16958	DMOJ DMOPC '18 Contest 1 P3 - Sorting
16957	DMOJ DMOPC '18 Contest 1 P2 - Sorting
16956	DMOJ DMOPC '18 Contest 1 P1 - Sorting
16955	DMOJ DMOPC '18 Contest 1 P0 - Sorting
16954	DMOJ DMOPC '17 Contest 5 P6 - Bridges
16953	DMOJ DMOPC '17 Contest 5 P5 - XOR Bridges
16952	DMOJ DMOPC '17 Contest 5 P4 - Intersecting Arcs

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

17001

DMOJ DMOPC '19 Contest 1 P4 - A Strange Graph

17000

DMOJ DMOPC '19 Contest 1 P3 - Simple Math

16999

DMOJ DMOPC '19 Contest 1 P2 - Good Writing

16998

DMOJ DMOPC '19 Contest 1 P1 - Test Scores

16997

DMOJ DMOPC '19 Contest 1 P0 - Range Finding

16996