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)
8671 Codeforces 1830C: Hyperregular Bracket Strings
8670 Codeforces 1830B: The BOSS Can Count Pairs
8669 Codeforces 1830A: Copil Copac Draws Trees
8668 Codeforces 1829H: Don't Blame Me
8667 Codeforces 1829G: Hits Different
8666 Codeforces 1829F: Forever Winter
8665 Codeforces 1829E: The Lakes
8664 Codeforces 1829D: Gold Rush
8663 Codeforces 1829C: Mr. Perfectly Fine
8662 Codeforces 1829B: Blank Space
8661 Codeforces 1829A: Love Story
8660 Codeforces 1828B: Permutation Swap
8659 Codeforces 1828A: Divisible Array
8658 Codeforces 1827F: Copium Permutation
8657 Codeforces 1827E: Bus Routes
8656 Codeforces 1827D: Two Centroids
8655 Codeforces 1827C: Palindrome Partition
8654 Codeforces 1827B2: Range Sorting (Hard Version)
8653 Codeforces 1827B1: Range Sorting (Easy Version)
8652 Codeforces 1827A: Counting Orders
8651 Codeforces 1826F: Fading into Fog
8650 Codeforces 1826E: Walk the Runway
8649 Codeforces 1826D: Running Miles
8648 Codeforces 1826C: Dreaming of Freedom
8647 Codeforces 1826B: Lunatic Never Content
8646 Codeforces 1826A: Trust Nobody
8645 Codeforces 1825B: LuoTianyi and the Table
8644 Codeforces 1825A: LuoTianyi and the Palindrome String
8643 Codeforces 1824E: LuoTianyi and Cartridge
8642 Codeforces 1824D: LuoTianyi and the Function
8641 Codeforces 1824C: LuoTianyi and XOR-Tree
8640 Codeforces 1824B2: LuoTianyi and the Floating Islands (Hard Version)
8639 Codeforces 1824B1: LuoTianyi and the Floating Islands (Easy Version)
8638 Codeforces 1824A: LuoTianyi and the Show
8637 Codeforces 1823F: Random Walk
8636 Codeforces 1823E: Removing Graph
8635 Codeforces 1823D: Unique Palindromes
8634 Codeforces 1823C: Strongly Composite
8633 Codeforces 1823B: Sort with Step
8632 Codeforces 1823A: A-characteristic
8631 Codeforces 1822G2: Magic Triples (Hard Version)
8630 Codeforces 1822G1: Magic Triples (Easy Version)
8629 Codeforces 1822F: Gardening Friends
8628 Codeforces 1822E: Making Anti-Palindromes
8627 Codeforces 1822D: Super-Permutation
8626 Codeforces 1822C: Bun Lover
8625 Codeforces 1822B: Karina and Array
8624 Codeforces 1822A: TubeTube Feed
8623 Codeforces 1821F: Timber
8622 Codeforces 1821E: Rearrange Brackets
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