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)
24371 Codeforces 1902E: Collapsing Strings
24370 Codeforces 1902D: Robot Queries
24369 Codeforces 1902C: Insert and Equalize
24368 Codeforces 1902B: Getting Points
24367 Codeforces 1902A: Binary Imbalance
24366 Codeforces 1901F: Landscaping
24365 Codeforces 1901E: Compressed Tree
24364 Codeforces 1901D: Yet Another Monster Fight
24363 Codeforces 1901C: Add, Divide and Floor
24362 Codeforces 1901B: Chip and Ribbon
24361 Codeforces 1901A: Line Trip
24360 Codeforces 1900F: Local Deletions
24359 Codeforces 1900E: Transitive Graph
24358 Codeforces 1900D: Small GCD
24357 Codeforces 1900C: Anji's Binary Tree
24356 Codeforces 1900B: Laura and Operations
24355 Codeforces 1900A: Cover in Water
24354 Codeforces 1899G: Unusual Entertainment
24353 Codeforces 1899F: Alex's whims
24352 Codeforces 1899E: Queue Sort
24351 Codeforces 1899D: Yarik and Musical Notes
24350 Codeforces 1899C: Yarik and Array
24349 Codeforces 1899B: 250 Thousand Tons of TNT
24348 Codeforces 1899A: Game with Integers
24347 Codeforces 1898F: Vova Escapes the Matrix
24346 Codeforces 1898E: Sofia and Strings
24345 Codeforces 1898D: Absolute Beauty
24344 Codeforces 1898C: Colorful Grid
24343 Codeforces 1898B: Milena and Admirer
24342 Codeforces 1898A: Milica and String
24341 Codeforces 1896H2: Cyclic Hamming (Hard Version)
24340 Codeforces 1896H1: Cyclic Hamming (Easy Version)
24339 Codeforces 1896G: Pepe Racing
24338 Codeforces 1896F: Bracket Xoring
24337 Codeforces 1896E: Permutation Sorting
24336 Codeforces 1896D: Ones and Twos
24335 Codeforces 1896C: Matching Arrays
24334 Codeforces 1896B: AB Flipping
24333 Codeforces 1896A: Jagged Swaps
24332 Codeforces 1895G: Two Characters, Two Colors
24331 Codeforces 1895F: Fancy Arrays
24330 Codeforces 1895E: Infinite Card Game
24329 Codeforces 1895D: XOR Construction
24328 Codeforces 1895C: Torn Lucky Ticket
24327 Codeforces 1895B: Points and Minimum Distance
24326 Codeforces 1895A: Treasure Chest
24325 Codeforces 1894B: Two Out of Three
24324 Codeforces 1894A: Secret Sport
24323 Codeforces 1893E: Cacti Symphony
24322 Codeforces 1893D: Colorful Constructive
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