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)
18901	DMOJ Postfix Notation
18900	DMOJ XIV POI Stage I - Queries
18899	DMOJ Confirmation Bias
18898	DMOJ Pipe Dream
18897	DMOJ Pillaging
18896	DMOJ Piggy
18895	DMOJ Pie
18894	DMOJ Pick It
18893	DMOJ PIB '20 P7 - Karnaugh Maps
18892	DMOJ PIB '20 P6 - Rotational Top Trees
18891	DMOJ PIB '20 P5 - 4D Matrices
18890	DMOJ PIB '20 P4 - Ninjaclasher the Perfect Man
18889	DMOJ PIB '20 P3 - Rulebreaker
18888	DMOJ PIB '20 P2 - 2 + 2 = 5
18887	DMOJ PIB '20 P1 - Marcus and Head Bonks
18886	DMOJ Phantom's Python Challenge
18885	DMOJ The Torture Chamber
18884	DMOJ The Third Cellar
18883	DMOJ The Mirror
18882	DMOJ Persuasion
18881	DMOJ Perl Golf
18880	DMOJ Power Eggs
18879	DMOJ Peculiar Paints
18878	DMOJ Prefix Digits
18877	DMOJ Path Finder 2: Electric Boogaloo
18876	DMOJ Path Finder
18875	DMOJ ICPC PACNW 2016 L - Windy Path
18874	DMOJ ICPC PACNW 2016 K - Tournament Wins
18873	DMOJ ICPC PACNW 2016 J - Shopping
18872	DMOJ ICPC PACNW 2016 I - Postman
18871	DMOJ ICPC PACNW 2016 H - Paint
18870	DMOJ ICPC PACNW 2016 G - Maximum Islands
18869	DMOJ ICPC PACNW 2016 F - Illumination
18868	DMOJ ICPC PACNW 2016 E - Enclosure
18867	DMOJ ICPC PACNW 2016 D - Contest Strategy
18866	DMOJ ICPC PACNW 2016 C - Cameras
18865	DMOJ ICPC PACNW 2016 B - Buggy Robot
18864	DMOJ ICPC PACNW 2016 A - Alphabet
18863	DMOJ ICPC PACNW 2010 I - Zombie Fences 2: Electric Boogaloo
18862	DMOJ BlueBook - Equation
18861	DMOJ BlueBook - Multiple
18860	DMOJ BlueBook - Calculator
18859	DMOJ BlueBook - Leap Year
18858	DMOJ BlueBook - Grades
18857	DMOJ BlueBook - Days
18856	DMOJ BlueBook - Prime
18855	DMOJ BlueBook - Lower Case
18854	DMOJ BlueBook - Digits
18853	DMOJ BlueBook - First Blank
18852	DMOJ BlueBook - Min

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

18901

DMOJ Postfix Notation

18900

DMOJ XIV POI Stage I - Queries

18899

DMOJ Confirmation Bias

18898

DMOJ Pipe Dream

18897

DMOJ Pillaging

18896