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)
6271 Codeforces 1393D: Rarity and New Dress
6270 Codeforces 1393C: Pinkie Pie Eats Patty-cakes
6269 Codeforces 1393B: Applejack and Storages
6268 Codeforces 1393A: Rainbow Dash, Fluttershy and Chess Coloring
6267 Codeforces 1392I: Kevin and Grid
6266 Codeforces 1392H: ZS Shuffles Cards
6265 Codeforces 1392G: Omkar and Pies
6264 Codeforces 1392F: Omkar and Landslide
6263 Codeforces 1392E: Omkar and Duck
6262 Codeforces 1392D: Omkar and Bed Wars
6261 Codeforces 1392C: Omkar and Waterslide
6260 Codeforces 1392B: Omkar and Infinity Clock
6259 Codeforces 1392A: Omkar and Password
6258 Codeforces 1391E: Pairs of Pairs
6257 Codeforces 1391D: 505
6256 Codeforces 1391C: Cyclic Permutations
6255 Codeforces 1391B: Fix You
6254 Codeforces 1391A: Suborrays
6253 Codeforces 1389G: Directing Edges
6252 Codeforces 1389F: Bicolored Segments
6251 Codeforces 1389E: Calendar Ambiguity
6250 Codeforces 1389D: Segment Intersections
6249 Codeforces 1389C: Good String
6248 Codeforces 1389B: Array Walk
6247 Codeforces 1389A: LCM Problem
6246 Codeforces 1388E: Uncle Bogdan and Projections
6245 Codeforces 1388D: Captain Flint and Treasure
6244 Codeforces 1388C: Uncle Bogdan and Country Happiness
6243 Codeforces 1388B: Captain Flint and a Long Voyage
6242 Codeforces 1388A: Captain Flint and Crew Recruitment
6241 Codeforces 1387C: Viruses
6240 Codeforces 1387B2: Village (Maximum)
6239 Codeforces 1387B1: Village (Minimum)
6238 Codeforces 1387A: Graph
6237 Codeforces 1386C: Joker
6236 Codeforces 1386B: Mixture
6235 Codeforces 1386A: Colors
6234 Codeforces 1385G: Columns Swaps
6233 Codeforces 1385F: Removing Leaves
6232 Codeforces 1385E: Directing Edges
6231 Codeforces 1385D: a-Good String
6230 Codeforces 1385C: Make It Good
6229 Codeforces 1385B: Restore the Permutation by Merger
6228 Codeforces 1385A: Three Pairwise Maximums
6227 Codeforces 1384B2: Koa and the Beach (Hard Version)
6226 Codeforces 1384B1: Koa and the Beach (Easy Version)
6225 Codeforces 1384A: Common Prefixes
6224 Codeforces 1383F: Special Edges
6223 Codeforces 1383E: Strange Operation
6222 Codeforces 1383D: Rearrange
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