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)
1501	Codeforces 337D: Book of Evil
1500	Codeforces 337C: Quiz
1499	Codeforces 337B: Routine Problem
1498	Codeforces 337A: Puzzles
1497	Codeforces 336E: Vasily the Bear and Painting Square
1496	Codeforces 336D: Vasily the Bear and Beautiful Strings
1495	Codeforces 336C: Vasily the Bear and Sequence
1494	Codeforces 336B: Vasily the Bear and Fly
1493	Codeforces 336A: Vasily the Bear and Triangle
1492	Codeforces 335F: Buy One, Get One Free
1491	Codeforces 335E: Counting Skyscrapers
1490	Codeforces 335D: Rectangles and Square
1489	Codeforces 335C: More Reclamation
1488	Codeforces 335B: Palindrome
1487	Codeforces 335A: Banana
1486	Codeforces 334B: Eight Point Sets
1485	Codeforces 334A: Candy Bags
1484	Codeforces 333E: Summer Earnings
1483	Codeforces 333D: Characteristics of Rectangles
1482	Codeforces 333C: Lucky Tickets
1481	Codeforces 333B: Chips
1480	Codeforces 333A: Secrets
1479	Codeforces 332E: Binary Key
1478	Codeforces 332D: Theft of Blueprints
1477	Codeforces 332C: Students' Revenge
1476	Codeforces 332B: Maximum Absurdity
1475	Codeforces 332A: Down the Hatch!
1474	Codeforces 331E2: Deja Vu
1473	Codeforces 331E1: Deja Vu
1472	Codeforces 331D3: Escaping on Beaveractor
1471	Codeforces 331D2: Escaping on Beaveractor
1470	Codeforces 331D1: Escaping on Beaveractor
1469	Codeforces 331C3: The Great Julya Calendar
1468	Codeforces 331C2: The Great Julya Calendar
1467	Codeforces 331C1: The Great Julya Calendar
1466	Codeforces 331B2: Shave Beaver!
1465	Codeforces 331B1: Shave Beaver!
1464	Codeforces 331A2: Oh Sweet Beaverette
1463	Codeforces 331A1: Oh Sweet Beaverette
1462	Codeforces 330B: Road Construction
1461	Codeforces 330A: Cakeminator
1460	Codeforces 329E: Evil
1459	Codeforces 329D: The Evil Temple and the Moving Rocks
1458	Codeforces 329C: Graph Reconstruction
1457	Codeforces 329B: Biridian Forest
1456	Codeforces 329A: Purification
1455	Codeforces 328B: Sheldon and Ice Pieces
1454	Codeforces 328A: IQ Test
1453	Codeforces 327E: Axis Walking
1452	Codeforces 327D: Block Tower

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

1501

Codeforces 337D: Book of Evil

1500

Codeforces 337C: Quiz

1499

Codeforces 337B: Routine Problem

1498

Codeforces 337A: Puzzles

1497

Codeforces 336E: Vasily the Bear and Painting Square

1496