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)
8221 Codeforces 1760B: Atilla's Favorite Problem
8220 Codeforces 1760A: Medium Number
8219 Codeforces 1759G: Restore the Permutation
8218 Codeforces 1759F: All Possible Digits
8217 Codeforces 1759E: The Humanoid
8216 Codeforces 1759D: Make It Round
8215 Codeforces 1759C: Thermostat
8214 Codeforces 1759B: Lost Permutation
8213 Codeforces 1759A: Yes-Yes?
8212 Codeforces 1758F: Decent Division
8211 Codeforces 1758E: Tick, Tock
8210 Codeforces 1758D: Range = √Sum
8209 Codeforces 1758C: Almost All Multiples
8208 Codeforces 1758B: XOR = Average
8207 Codeforces 1758A: SSeeeeiinngg DDoouubbllee
8206 Codeforces 1754B: Kevin and Permutation
8205 Codeforces 1754A: Technical Support
8204 Codeforces 1753F: Minecraft Series
8203 Codeforces 1753E: N Machines
8202 Codeforces 1753D: The Beach
8201 Codeforces 1753C: Wish I Knew How to Sort
8200 Codeforces 1753B: Factorial Divisibility
8199 Codeforces 1753A2: Make Nonzero Sum (hard version)
8198 Codeforces 1753A1: Make Nonzero Sum (easy version)
8197 Codeforces 1750H: BinaryStringForces
8196 Codeforces 1750G: Doping
8195 Codeforces 1750F: Majority
8194 Codeforces 1750E: Bracket Cost
8193 Codeforces 1750D: Count GCD
8192 Codeforces 1750C: Complementary XOR
8191 Codeforces 1750B: Maximum Substring
8190 Codeforces 1750A: Indirect Sort
8189 Codeforces 1749F: Distance to the Path
8188 Codeforces 1749E: Cactus Wall
8187 Codeforces 1749D: Counting Arrays
8186 Codeforces 1749C: Number Game
8185 Codeforces 1749B: Death's Blessing
8184 Codeforces 1749A: Cowardly Rooks
8183 Codeforces 1748F: Circular Xor Reversal
8182 Codeforces 1748E: Yet Another Array Counting Problem
8181 Codeforces 1748D: ConstructOR
8180 Codeforces 1748C: Zero-Sum Prefixes
8179 Codeforces 1748B: Diverse Substrings
8178 Codeforces 1748A: The Ultimate Square
8177 Codeforces 1747E: List Generation
8176 Codeforces 1747D: Yet Another Problem
8175 Codeforces 1747C: Swap Game
8174 Codeforces 1747B: BAN BAN
8173 Codeforces 1747A: Two Groups
8172 Codeforces 1746G: Olympiad Training
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