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)
19251	DMOJ TLE '17 Contest 5 P5 - Word Compression
19250	DMOJ TLE '17 Contest 5 P4 - Cloning
19249	DMOJ TLE '17 Contest 5 P3 - Willson and Factorization
19248	DMOJ TLE '17 Contest 5 P2 - Delivery Service II
19247	DMOJ TLE '17 Contest 5 P1 - Guess the Number
19246	DMOJ TLE '17 Contest 4 P6 - Fax's Christmas Bash
19245	DMOJ TLE '17 Contest 4 P5 - Pascal's Tree
19244	DMOJ TLE '17 Contest 4 P4 - Willson and Target Practice
19243	DMOJ TLE '17 Contest 4 P3 - Fax's Christmas Dish
19242	DMOJ TLE '17 Contest 4 P2 - Microwave Buttons
19241	DMOJ TLE '17 Contest 4 P1 - Riding the Curve
19240	DMOJ TLE '17 Contest 3 P6 - Donut Coupons
19239	DMOJ TLE '17 Contest 3 P5 - Hypercube Hotel
19238	DMOJ TLE '17 Contest 3 P4 - Meatballs
19237	DMOJ TLE '17 Contest 3 P3 - Fax's Thanksgiving Dish
19236	DMOJ TLE '17 Contest 3 P2 - Sectors
19235	DMOJ TLE '17 Contest 3 P1 - Willson and Territory
19234	DMOJ TLE '17 Contest 2 P6 - Save Jody!
19233	DMOJ TLE '17 Contest 2 P5 - Crew Selection Test
19232	DMOJ TLE '17 Contest 2 P4 - ECOO
19231	DMOJ TLE '17 Contest 2 P3 - Willson and Migration
19230	DMOJ TLE '17 Contest 2 P2 - Unlucky Numbers
19229	DMOJ TLE '17 Contest 2 P1 - Cadadr
19228	DMOJ TLE '17 Contest 1 P6 - Investment
19227	DMOJ TLE '17 Contest 1 P5 - Cake
19226	DMOJ TLE '17 Contest 1 P4 - Tempest
19225	DMOJ TLE '17 Contest 1 P3 - Screensaver 2
19224	DMOJ TLE '17 Contest 1 P2 - Willson and Food
19223	DMOJ TLE '17 Contest 1 P1 - String Rounding
19222	DMOJ TLE '16 Contest 8 P6 - Traffic Lights
19221	DMOJ TLE '16 Contest 8 P5 - Prom Night
19220	DMOJ TLE '16 Contest 8 P4 - Delivery Service
19219	DMOJ TLE '16 Contest 8 P3 - Fool's Sequence
19218	DMOJ TLE '16 Contest 8 P2 - Dank Meme
19217	DMOJ TLE '16 Contest 8 P1 - Paper Hole Punching
19216	DMOJ TLE '16 Contest 7 P6 - Everyone Hates Reading
19215	DMOJ TLE '16 Contest 7 P5 - Shortest Path Faster Algorithm
19214	DMOJ TLE '16 Contest 7 P4 - Abstract Problem
19213	DMOJ TLE '16 Contest 7 P3 - NOR
19212	DMOJ TLE '16 Contest 7 P2 - Judging
19211	DMOJ TLE '16 Contest 7 P1 - Math Helper
19210	DMOJ TLE '16 Contest 6 (Mock CCC) S5 - Toll Routes
19209	DMOJ TLE '16 Contest 6 (Mock CCC) S4 - Bubble Sort
19208	DMOJ TLE '16 Contest 6 (Mock CCC) S3 - Hyper Fax
19207	DMOJ TLE '16 Contest 6 (Mock CCC) S2 - Paper Stapling
19206	DMOJ TLE '16 Contest 6 (Mock CCC) S1 - Writing the CCC
19205	DMOJ TLE '16 Contest 6 (Mock CCC) J5 - Meal Plan
19204	DMOJ TLE '16 Contest 6 (Mock CCC) J4 - Ski Rentals
19203	DMOJ TLE '16 Contest 6 (Mock CCC) J3 - Two Kangaroos
19202	DMOJ TLE '16 Contest 6 (Mock CCC) J2 - Carol's Flowers

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

19251

DMOJ TLE '17 Contest 5 P5 - Word Compression

19250

DMOJ TLE '17 Contest 5 P4 - Cloning

19249

DMOJ TLE '17 Contest 5 P3 - Willson and Factorization

19248

DMOJ TLE '17 Contest 5 P2 - Delivery Service II

19247

DMOJ TLE '17 Contest 5 P1 - Guess the Number

19246