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)
8371 Codeforces 1778E: The Tree Has Fallen!
8370 Codeforces 1778D: Flexible String Revisit
8369 Codeforces 1778C: Flexible String
8368 Codeforces 1778B: The Forbidden Permutation
8367 Codeforces 1778A: Flip Flop Sum
8366 Codeforces 1777F: Comfortably Numb
8365 Codeforces 1777E: Edge Reverse
8364 Codeforces 1777D: Score of a Tree
8363 Codeforces 1777C: Quiz Master
8362 Codeforces 1777B: Emordnilap
8361 Codeforces 1777A: Everybody Likes Good Arrays!
8360 Codeforces 1776N: Count Permutations
8359 Codeforces 1776M: Parmigiana With Seafood
8358 Codeforces 1776L: Controllers
8357 Codeforces 1776K: Uniform Chemistry
8356 Codeforces 1776J: Italian Data Centers
8355 Codeforces 1776I: Spinach Pizza
8354 Codeforces 1776H: Beppa and SwerChat
8353 Codeforces 1776G: Another Wine Tasting Event
8352 Codeforces 1776F: Train Splitting
8351 Codeforces 1776E: Crossing the Railways
8350 Codeforces 1776D: Teamwork
8349 Codeforces 1776C: Library game
8348 Codeforces 1776B: Vittorio Plays with LEGO Bricks
8347 Codeforces 1776A: Walking Boy
8346 Codeforces 1775F: Laboratory on Pluto
8345 Codeforces 1775E: The Human Equation
8344 Codeforces 1775D: Friendly Spiders
8343 Codeforces 1775C: Interesting Sequence
8342 Codeforces 1775B: Gardener and the Array
8341 Codeforces 1775A2: Gardener and the Capybaras (hard version)
8340 Codeforces 1775A1: Gardener and the Capybaras (easy version)
8339 Codeforces 1774H: Maximum Permutation
8338 Codeforces 1774G: Segment Covering
8337 Codeforces 1774F2: Magician and Pigs (Hard Version)
8336 Codeforces 1774F1: Magician and Pigs (Easy Version)
8335 Codeforces 1774E: Two Chess Pieces
8334 Codeforces 1774D: Same Count One
8333 Codeforces 1774C: Ice and Fire
8332 Codeforces 1774B: Coloring
8331 Codeforces 1774A: Add Plus Minus Sign
8330 Codeforces 1773L: Lisa's Sequences
8329 Codeforces 1773K: King's Puzzle
8328 Codeforces 1773J: Jumbled Trees
8327 Codeforces 1773I: Interactive Factorial Guessing
8326 Codeforces 1773H: Hot and Cold
8325 Codeforces 1773G: Game of Questions
8324 Codeforces 1773F: Football
8323 Codeforces 1773E: Easy Assembly
8322 Codeforces 1773D: Dominoes
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