Starlight: List of Problems

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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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ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
5371 Codeforces 1214H: Tiles Placement
5370 Codeforces 1214G: Feeling Good
5369 Codeforces 1214F: Employment
5368 Codeforces 1214E: Petya and Construction Set
5367 Codeforces 1214D: Treasure Island
5366 Codeforces 1214C: Bad Sequence
5365 Codeforces 1214B: Badges
5364 Codeforces 1214A: Optimal Currency Exchange
5363 Codeforces 1213G: Path Queries
5362 Codeforces 1213F: Unstable String Sort
5361 Codeforces 1213E: Two Small Strings
5360 Codeforces 1213D2: Equalizing by Division (hard version)
5359 Codeforces 1213D1: Equalizing by Division (easy version)
5358 Codeforces 1213C: Book Reading
5357 Codeforces 1213B: Bad Prices
5356 Codeforces 1213A: Chips Moving
5355 Codeforces 1211I: Unusual Graph
5354 Codeforces 1211H: Road Repair in Treeland
5353 Codeforces 1211G: King's Path
5352 Codeforces 1211F: kotlinkotlinkotlinkotlin...
5351 Codeforces 1211E: Double Permutation Inc.
5350 Codeforces 1211D: Teams
5349 Codeforces 1211C: Ice Cream
5348 Codeforces 1211B: Traveling Around the Golden Ring of Berland
5347 Codeforces 1211A: Three Problems
5346 Codeforces 1210G: Mateusz and Escape Room
5345 Codeforces 1210F2: Marek and Matching (hard version)
5344 Codeforces 1210F1: Marek and Matching (easy version)
5343 Codeforces 1210E: Wojtek and Card Tricks
5342 Codeforces 1210D: Konrad and Company Evaluation
5341 Codeforces 1210C: Kamil and Making a Stream
5340 Codeforces 1210B: Marcin and Training Camp
5339 Codeforces 1210A: Anadi and Domino
5338 Codeforces 1209H: Moving Walkways
5337 Codeforces 1209G2: Into Blocks (hard version)
5336 Codeforces 1209G1: Into Blocks (easy version)
5335 Codeforces 1209F: Koala and Notebook
5334 Codeforces 1209E2: Rotate Columns (hard version)
5333 Codeforces 1209E1: Rotate Columns (easy version)
5332 Codeforces 1209D: Cow and Snacks
5331 Codeforces 1209C: Paint the Digits
5330 Codeforces 1209B: Koala and Lights
5329 Codeforces 1209A: Paint the Numbers
5328 Codeforces 1208H: Red Blue Tree
5327 Codeforces 1208G: Polygons
5326 Codeforces 1208F: Bits And Pieces
5325 Codeforces 1208E: Let Them Slide
5324 Codeforces 1208D: Restore Permutation
5323 Codeforces 1208C: Magic Grid
5322 Codeforces 1208B: Uniqueness
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