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)
18501	DMOJ ICPC NAQ 2016 K - Robotopia
18500	DMOJ ICPC NAQ 2016 J - Quick Estimates
18499	DMOJ ICPC NAQ 2016 I - Primonimo
18498	DMOJ ICPC NAQ 2016 H - Nine Packs
18497	DMOJ ICPC NAQ 2016 G - Inverse Factorial
18496	DMOJ ICPC NAQ 2016 F - Free Desserts
18495	DMOJ ICPC NAQ 2016 E - Dots and Boxes
18494	DMOJ ICPC NAQ 2016 D - Brackets
18493	DMOJ ICPC NAQ 2016 C - Big Truck
18492	DMOJ ICPC NAQ 2016 B - Arcade!
18491	DMOJ ICPC NAQ 2016 A - A New Alphabet
18490	DMOJ ICPC NAQ 2015 G - Safe Passage
18489	DMOJ ICPC NAQ 2015 F - Quick Brown Fox
18488	DMOJ ICPC NAQ 2015 A - All About That Base
18487	DMOJ Mynerva
18486	DMOJ MWC '15 #8 P3: Draw Down
18485	DMOJ MWC '15 #8 P2: ASCII Art
18484	DMOJ MWC '15 #8 P1: Push-up Contest
18483	DMOJ MWC '15 #7 P3: Blue and Green
18482	DMOJ MWC '15 #7 P2: Thief in the Night
18481	DMOJ MWC '15 #7 P1: Sequences
18480	DMOJ MWC '15 #6 P3: Magical Sets
18479	DMOJ MWC '15 #6 P2: Breadwinners
18478	DMOJ MWC '15 #6 P1: Regpo
18477	DMOJ MWC '15 #5 P3: French Words
18476	DMOJ MWC '15 #5 P2: WildCard
18475	DMOJ MWC '15 #5 P1: Stats
18474	DMOJ MWC '15 #4 P5: Arts and Crafts
18473	DMOJ MWC '15 #4 P4: Dealing with Knots
18472	DMOJ MWC '15 #4 P3: Salt
18471	DMOJ MWC '15 #4 P2: Data Formatting
18470	DMOJ MWC '15 #4 P1: Love Guru 2
18469	DMOJ MWC '15 #3 P3: Bad News
18468	DMOJ MWC '15 #3 P2: Mechanical Pencils
18467	DMOJ MWC '15 #3 P1: Challenger Promos
18466	DMOJ MWC '15 #2 P5: Watchmeblink1
18465	DMOJ MWC '15 #2 P4: Robotics Summative
18464	DMOJ MWC '15 #2 P3: Breaking Ice
18463	DMOJ MWC '15 #2 P2: Towering Towers
18462	DMOJ MWC '15 #2 P1: Symmetry
18461	DMOJ MWC '15 #1 P5: Love Guru
18460	DMOJ MWC '15 #1 P4: Genetic Probability
18459	DMOJ MWC '15 #1 P3: Dolls
18458	DMOJ MWC '15 #1 P2: Postcard
18457	DMOJ MWC '15 #1 P1: Playlist Panic
18456	DMOJ Dream and the Multiverse
18455	DMOJ Multiplication Madness
18454	DMOJ Mohan's Physics Problem
18453	DMOJ Moses Needs Help
18452	DMOJ Monkey Motel

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

18501

DMOJ ICPC NAQ 2016 K - Robotopia

18500

DMOJ ICPC NAQ 2016 J - Quick Estimates

18499

DMOJ ICPC NAQ 2016 I - Primonimo

18498

DMOJ ICPC NAQ 2016 H - Nine Packs

18497

DMOJ ICPC NAQ 2016 G - Inverse Factorial

18496