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)
5271 Codeforces 1198F: GCD Groups 2
5270 Codeforces 1198E: Rectangle Painting 2
5269 Codeforces 1198D: Rectangle Painting 1
5268 Codeforces 1198C: Matching vs Independent Set
5267 Codeforces 1198B: Welfare State
5266 Codeforces 1198A: MP3
5265 Codeforces 1197F: Coloring Game
5264 Codeforces 1197E: Culture Code
5263 Codeforces 1197D: Yet Another Subarray Problem
5262 Codeforces 1197C: Array Splitting
5261 Codeforces 1197B: Pillars
5260 Codeforces 1197A: DIY Wooden Ladder
5259 Codeforces 1196F: K-th Path
5258 Codeforces 1196E: Connected Component on a Chessboard
5257 Codeforces 1196D2: RGB Substring (hard version)
5256 Codeforces 1196D1: RGB Substring (easy version)
5255 Codeforces 1196C: Robot Breakout
5254 Codeforces 1196B: Odd Sum Segments
5253 Codeforces 1196A: Three Piles of Candies
5252 Codeforces 1195F: Geometers Anonymous Club
5251 Codeforces 1195E: OpenStreetMap
5250 Codeforces 1195D2: Submarine in the Rybinsk Sea (hard edition)
5249 Codeforces 1195D1: Submarine in the Rybinsk Sea (easy edition)
5248 Codeforces 1195C: Basketball Exercise
5247 Codeforces 1195B: Sport Mafia
5246 Codeforces 1195A: Drinks Choosing
5245 Codeforces 1194G: Another Meme Problem
5244 Codeforces 1194F: Crossword Expert
5243 Codeforces 1194E: Count The Rectangles
5242 Codeforces 1194D: 1-2-K Game
5241 Codeforces 1194C: From S To T
5240 Codeforces 1194B: Yet Another Crosses Problem
5239 Codeforces 1194A: Remove a Progression
5238 Codeforces 1193C: Scissors and Tape
5237 Codeforces 1193B: Magic Tree
5236 Codeforces 1193A: Amusement Park
5235 Codeforces 1192C: Cubeword
5234 Codeforces 1192B: Dynamic Diameter
5233 Codeforces 1192A: Building Skyscrapers
5232 Codeforces 1191B: Tokitsukaze and Mahjong
5231 Codeforces 1191A: Tokitsukaze and Enhancement
5230 Codeforces 1190F: Tokitsukaze and Powers
5229 Codeforces 1190E: Tokitsukaze and Explosion
5228 Codeforces 1190D: Tokitsukaze and Strange Rectangle
5227 Codeforces 1190C: Tokitsukaze and Duel
5226 Codeforces 1190B: Tokitsukaze, CSL and Stone Game
5225 Codeforces 1190A: Tokitsukaze and Discard Items
5224 Codeforces 1189C: Candies!
5223 Codeforces 1189B: Number Circle
5222 Codeforces 1189A: Keanu Reeves
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