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)
8771 Codeforces 1846E1: Rudolf and Snowflakes (simple version)
8770 Codeforces 1846D: Rudolph and Christmas Tree
8769 Codeforces 1846C: Rudolf and the Another Competition
8768 Codeforces 1846B: Rudolph and Tic-Tac-Toe
8767 Codeforces 1846A: Rudolph and Cut the Rope
8766 Codeforces 1845F: Swimmers in the Pool
8765 Codeforces 1845E: Boxes and Balls
8764 Codeforces 1845D: Rating System
8763 Codeforces 1845C: Strong Password
8762 Codeforces 1845B: Come Together
8761 Codeforces 1845A: Forbidden Integer
8760 Codeforces 1844H: Multiple of Three Cycles
8759 Codeforces 1844G: Tree Weights
8758 Codeforces 1844F2: Min Cost Permutation (Hard Version)
8757 Codeforces 1844F1: Min Cost Permutation (Easy Version)
8756 Codeforces 1844E: Great Grids
8755 Codeforces 1844D: Row Major
8754 Codeforces 1844C: Particles
8753 Codeforces 1844B: Permutations & Primes
8752 Codeforces 1844A: Subtraction Game
8751 Codeforces 1843F2: Omsk Metro (hard version)
8750 Codeforces 1843F1: Omsk Metro (simple version)
8749 Codeforces 1843E: Tracking Segments
8748 Codeforces 1843D: Apple Tree
8747 Codeforces 1843C: Sum in Binary Tree
8746 Codeforces 1843B: Long Long
8745 Codeforces 1843A: Sasha and Array Coloring
8744 Codeforces 1842I: Tenzing and Necklace
8743 Codeforces 1842H: Tenzing and Random Real Numbers
8742 Codeforces 1842G: Tenzing and Random Operations
8741 Codeforces 1842F: Tenzing and Tree
8740 Codeforces 1842E: Tenzing and Triangle
8739 Codeforces 1842D: Tenzing and His Animal Friends
8738 Codeforces 1842C: Tenzing and Balls
8737 Codeforces 1842B: Tenzing and Books
8736 Codeforces 1842A: Tenzing and Tsondu
8735 Codeforces 1841F: Monocarp and a Strategic Game
8734 Codeforces 1841E: Fill the Matrix
8733 Codeforces 1841D: Pairs of Segments
8732 Codeforces 1841C: Ranom Numbers
8731 Codeforces 1841B: Keep it Beautiful
8730 Codeforces 1841A: Game with Board
8729 Codeforces 1840G2: In Search of Truth (Hard Version)
8728 Codeforces 1840G1: In Search of Truth (Easy Version)
8727 Codeforces 1840F: Railguns
8726 Codeforces 1840E: Character Blocking
8725 Codeforces 1840D: Wooden Toy Festival
8724 Codeforces 1840C: Ski Resort
8723 Codeforces 1840B: Binary Cafe
8722 Codeforces 1840A: Cipher Shifer
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