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)
8271 Codeforces 1765N: Number Reduction
8270 Codeforces 1765M: Minimum LCM
8269 Codeforces 1765L: Project Manager
8268 Codeforces 1765K: Torus Path
8267 Codeforces 1765J: Hero to Zero
8266 Codeforces 1765I: Infinite Chess
8265 Codeforces 1765H: Hospital Queue
8264 Codeforces 1765G: Guess the String
8263 Codeforces 1765F: Chemistry Lab
8262 Codeforces 1765E: Exchange
8261 Codeforces 1765D: Watch the Videos
8260 Codeforces 1765C: Card Guessing
8259 Codeforces 1765B: Broken Keyboard
8258 Codeforces 1765A: Access Levels
8257 Codeforces 1764H: Doremy's Paint 2
8256 Codeforces 1764G3: Doremy's Perfect DS Class (Hard Version)
8255 Codeforces 1764G2: Doremy's Perfect DS Class (Medium Version)
8254 Codeforces 1764G1: Doremy's Perfect DS Class (Easy Version)
8253 Codeforces 1764F: Doremy's Experimental Tree
8252 Codeforces 1764E: Doremy's Number Line
8251 Codeforces 1764D: Doremy's Pegging Game
8250 Codeforces 1764C: Doremy's City Construction
8249 Codeforces 1764B: Doremy's Perfect Math Class
8248 Codeforces 1764A: Doremy's Paint
8247 Codeforces 1763F: Edge Queries
8246 Codeforces 1763E: Node Pairs
8245 Codeforces 1763D: Valid Bitonic Permutations
8244 Codeforces 1763C: Another Array Problem
8243 Codeforces 1763B: Incinerate
8242 Codeforces 1763A: Absolute Maximization
8241 Codeforces 1762G: Unequal Adjacent Elements
8240 Codeforces 1762F: Good Pairs
8239 Codeforces 1762E: Tree Sum
8238 Codeforces 1762D: GCD Queries
8237 Codeforces 1762C: Binary Strings are Fun
8236 Codeforces 1762B: Make Array Good
8235 Codeforces 1762A: Divide and Conquer
8234 Codeforces 1761G: Centroid Guess
8233 Codeforces 1761F2: Anti-median (Hard Version)
8232 Codeforces 1761F1: Anti-median (Easy Version)
8231 Codeforces 1761E: Make It Connected
8230 Codeforces 1761D: Carry Bit
8229 Codeforces 1761C: Set Construction
8228 Codeforces 1761B: Elimination of a Ring
8227 Codeforces 1761A: Two Permutations
8226 Codeforces 1760G: SlavicG's Favorite Problem
8225 Codeforces 1760F: Quests
8224 Codeforces 1760E: Binary Inversions
8223 Codeforces 1760D: Challenging Valleys
8222 Codeforces 1760C: Advantage
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