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)
7321 Codeforces 1600E: Array Game
7320 Codeforces 1599J: Bob's Beautiful Array
7319 Codeforces 1599I: Desert
7318 Codeforces 1599H: Hidden Fortress
7317 Codeforces 1599G: Shortest path
7316 Codeforces 1599F: Mars
7315 Codeforces 1599E: Two Arrays
7314 Codeforces 1599D: Bubble Popping
7313 Codeforces 1599C: Bubble Strike
7312 Codeforces 1599B: Restaurant Game
7311 Codeforces 1599A: Weights
7310 Codeforces 1598G: The Sum of Good Numbers
7309 Codeforces 1598F: RBS
7308 Codeforces 1598E: Staircases
7307 Codeforces 1598D: Training Session
7306 Codeforces 1598C: Delete Two Elements
7305 Codeforces 1598B: Groups
7304 Codeforces 1598A: Computer Game
7303 Codeforces 1594F: Ideal Farm
7302 Codeforces 1594E2: Rubik's Cube Coloring (hard version)
7301 Codeforces 1594E1: Rubik's Cube Coloring (easy version)
7300 Codeforces 1594D: The Number of Imposters
7299 Codeforces 1594C: Make Them Equal
7298 Codeforces 1594B: Special Numbers
7297 Codeforces 1594A: Consecutive Sum Riddle
7296 Codeforces 1593G: Changing Brackets
7295 Codeforces 1593F: Red-Black Number
7294 Codeforces 1593E: Gardener and Tree
7293 Codeforces 1593D2: Half of Same
7292 Codeforces 1593D1: All are Same
7291 Codeforces 1593C: Save More Mice
7290 Codeforces 1593B: Make it Divisible by 25
7289 Codeforces 1593A: Elections
7288 Codeforces 1592F2: Alice and Recoloring 2
7287 Codeforces 1592F1: Alice and Recoloring 1
7286 Codeforces 1592E: Bored Bakry
7285 Codeforces 1592D: Hemose in ICPC ?
7284 Codeforces 1592C: Bakry and Partitioning
7283 Codeforces 1592B: Hemose Shopping
7282 Codeforces 1592A: Gamer Hemose
7281 Codeforces 1588F: Jumping Through the Array
7280 Codeforces 1586I: Omkar and Mosaic
7279 Codeforces 1585G: Poachers
7278 Codeforces 1585F: Non-equal Neighbours
7277 Codeforces 1585E: Frequency Queries
7276 Codeforces 1585D: Yet Another Sorting Problem
7275 Codeforces 1585C: Minimize Distance
7274 Codeforces 1585B: Array Eversion
7273 Codeforces 1585A: Life of a Flower
7272 Codeforces 1584G: Eligible Segments
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