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)
23921 AtCoder ABC319: F. Fighter Takahashi
23920 AtCoder ABC319: E. Bus Stops
23919 AtCoder ABC319: D. Minimum Width
23918 AtCoder ABC319: C. False Hope
23917 AtCoder ABC319: B. Measure
23916 AtCoder ABC319: A. Legendary Players
23915 Codeforces 1872G: Replace With Product
23914 Codeforces 1872F: Selling a Menagerie
23913 Codeforces 1872E: Data Structures Fan
23912 Codeforces 1872D: Plus Minus Permutation
23911 Codeforces 1872C: Non-coprime Split
23910 Codeforces 1872B: The Corridor or There and Back Again
23909 Codeforces 1872A: Two Vessels
23908 DMOJ IOI '23 P6 - Robot Contest
23907 DMOJ IOI '23 P5 - Overtaking
23906 DMOJ IOI '23 P4 - Beech Tree
23905 Codeforces 1866M: Mighty Rock Tower
23904 Codeforces 1866L: Lihmuf Balling
23903 Codeforces 1866K: Keen Tree Calculation
23902 Codeforces 1866J: Jackets and Packets
23901 Codeforces 1866I: Imagination Castle
23900 Codeforces 1866H: Happy Sets
23899 Codeforces 1866G: Grouped Carriages
23898 Codeforces 1866F: Freak Joker Process
23897 Codeforces 1866E: Elevators of Tamem
23896 Codeforces 1866D: Digital Wallet
23895 Codeforces 1866C: Completely Searching for Inversions
23894 Codeforces 1866B: Battling with Numbers
23893 Codeforces 1866A: Ambitious Kid
23892 AtCoder ABC318: Ex. Count Strong Test Cases
23891 AtCoder ABC318: G. Typical Path Problem
23890 AtCoder ABC318: F. Octopus
23889 AtCoder ABC318: E. Sandwiches
23888 AtCoder ABC318: D. General Weighted Max Matching
23887 AtCoder ABC318: C. Blue Spring
23886 AtCoder ABC318: B. Overlapping sheets
23885 AtCoder ABC318: A. Full Moon
23884 DMOJ IOI '23 P3 - Soccer Stadium
23883 DMOJ IOI '23 P2 - Longest Trip
23882 DMOJ IOI '23 P1 - Closing Time
23881 Codeforces 1861F: Four Suits
23880 Codeforces 1861E: Non-Intersecting Subpermutations
23879 Codeforces 1861D: Sorting By Multiplication
23878 Codeforces 1861C: Queries for the Array
23877 Codeforces 1861B: Two Binary Strings
23876 Codeforces 1861A: Prime Deletion
23875 Codeforces 1863I: Redundant Routes
23874 Codeforces 1863H: Goldberg Machine 3
23873 Codeforces 1863G: Swaps
23872 Codeforces 1863F: Divide, XOR, and Conquer
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