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)
23551	USACO 2018 February Contest, Gold: Directory Traversal
23550	USACO 2018 February Contest, Gold: Snow Boots
23549	USACO 2018 February Contest, Platinum: Cow Gymnasts
23548	USACO 2018 February Contest, Platinum: New Barns
23547	USACO 2018 February Contest, Platinum: Slingshot
23546	USACO 2018 January Contest, Bronze: Out of Place
23545	USACO 2018 January Contest, Bronze: Lifeguards
23544	USACO 2018 January Contest, Bronze: Blocked Billboard II
23543	USACO 2018 January Contest, Silver: MooTube
23542	USACO 2018 January Contest, Silver: Rental Service
23541	USACO 2018 January Contest, Silver: Lifeguards
23540	USACO 2018 January Contest, Gold: Stamp Painting
23539	USACO 2018 January Contest, Gold: Cow at Large
23538	USACO 2018 January Contest, Gold: MooTube
23537	USACO 2018 January Contest, Platinum: Sprinklers
23536	USACO 2018 January Contest, Platinum: Cow at Large
23535	USACO 2018 January Contest, Platinum: Lifeguards
23534	USACO 2018 December Contest, Bronze: Back and Forth
23533	USACO 2018 December Contest, Bronze: The Bucket List
23532	USACO 2018 December Contest, Bronze: Mixing Milk
23531	USACO 2018 December Contest, Silver: Mooyo Mooyo
23530	USACO 2018 December Contest, Silver: Convention II
23529	USACO 2018 December Contest, Silver: Convention
23528	USACO 2018 December Contest, Gold: Teamwork
23527	USACO 2018 December Contest, Gold: Cowpatibility
23526	USACO 2018 December Contest, Gold: Fine Dining
23525	USACO 2018 December Contest, Platinum: The Cow Gathering
23524	USACO 2018 December Contest, Platinum: Sort It Out
23523	USACO 2018 December Contest, Platinum: Balance Beam
23522	USACO 2017 US Open Contest, Bronze: Modern Art
23521	USACO 2017 US Open Contest, Bronze: Bovine Genomics
23520	USACO 2017 US Open Contest, Bronze: The Lost Cow
23519	USACO 2017 US Open Contest, Silver: Where's Bessie?
23518	USACO 2017 US Open Contest, Silver: Bovine Genomics
23517	USACO 2017 US Open Contest, Silver: Paired Up
23516	USACO 2017 US Open Contest, Gold: Modern Art 2
23515	USACO 2017 US Open Contest, Gold: Bovine Genomics
23514	USACO 2017 US Open Contest, Platinum: COWBASIC
23513	USACO 2017 US Open Contest, Platinum: Switch Grass
23512	USACO 2017 US Open Contest, Platinum: Modern Art
23511	USACO 2017 February Contest, Bronze: Why Did the Cow Cross the Road III
23510	USACO 2017 February Contest, Bronze: Why Did the Cow Cross the Road II
23509	USACO 2017 February Contest, Bronze: Why Did the Cow Cross the Road
23508	USACO 2017 February Contest, Silver: Why Did the Cow Cross the Road III
23507	USACO 2017 February Contest, Silver: Why Did the Cow Cross the Road II
23506	USACO 2017 February Contest, Silver: Why Did the Cow Cross the Road
23505	USACO 2017 February Contest, Gold: Why Did the Cow Cross the Road III
23504	USACO 2017 February Contest, Gold: Why Did the Cow Cross the Road II
23503	USACO 2017 February Contest, Gold: Why Did the Cow Cross the Road
23502	USACO 2017 February Contest, Platinum: Why Did the Cow Cross the Road III

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

23551

USACO 2018 February Contest, Gold: Directory Traversal

23550

USACO 2018 February Contest, Gold: Snow Boots

23549

USACO 2018 February Contest, Platinum: Cow Gymnasts

23548

USACO 2018 February Contest, Platinum: New Barns

23547

USACO 2018 February Contest, Platinum: Slingshot

23546