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)
3601	Codeforces 846D: Monitor
3600	Codeforces 846C: Four Segments
3599	Codeforces 846B: Math Show
3598	Codeforces 846A: Curriculum Vitae
3597	Codeforces 845G: Shortest Path Problem?
3596	Codeforces 845F: Guards In The Storehouse
3595	Codeforces 845E: Fire in the City
3594	Codeforces 845D: Driving Test
3593	Codeforces 845C: Two TVs
3592	Codeforces 845B: Luba And The Ticket
3591	Codeforces 845A: Chess Tourney
3590	Codeforces 844B: Rectangles
3589	Codeforces 844A: Diversity
3588	Codeforces 843E: Maximum Flow
3587	Codeforces 843D: Dynamic Shortest Path
3586	Codeforces 843C: Upgrading Tree
3585	Codeforces 843B: Interactive LowerBound
3584	Codeforces 843A: Sorting by Subsequences
3583	Codeforces 842E: Nikita and game
3582	Codeforces 842D: Vitya and Strange Lesson
3581	Codeforces 842C: Ilya And The Tree
3580	Codeforces 842B: Gleb And Pizza
3579	Codeforces 842A: Kirill And The Game
3578	Codeforces 841B: Godsend
3577	Codeforces 841A: Generous Kefa
3576	Codeforces 840E: In a Trap
3575	Codeforces 840D: Destiny
3574	Codeforces 840C: On the Bench
3573	Codeforces 840B: Leha and another game about graph
3572	Codeforces 840A: Leha and Function
3571	Codeforces 839E: Mother of Dragons
3570	Codeforces 839D: Winter is here
3569	Codeforces 839C: Journey
3568	Codeforces 839B: Game of the Rows
3567	Codeforces 839A: Arya and Bran
3566	Codeforces 838F: Expected Earnings
3565	Codeforces 838E: Convex Countour
3564	Codeforces 838D: Airplane Arrangements
3563	Codeforces 838C: Future Failure
3562	Codeforces 838B: Diverging Directions
3561	Codeforces 838A: Binary Blocks
3560	Codeforces 837G: Functions On The Segments
3559	Codeforces 837F: Prefix Sums
3558	Codeforces 837E: Vasya's Function
3557	Codeforces 837D: Round Subset
3556	Codeforces 837C: Two Seals
3555	Codeforces 837B: Flag of Berland
3554	Codeforces 837A: Text Volume
3553	Codeforces 835F: Roads in the Kingdom
3552	Codeforces 835E: The penguin's game

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

3601

Codeforces 846D: Monitor

3600

Codeforces 846C: Four Segments

3599

Codeforces 846B: Math Show

3598

Codeforces 846A: Curriculum Vitae

3597

Codeforces 845G: Shortest Path Problem?

3596