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)
3321 Codeforces 778C: Peterson Polyglot
3320 Codeforces 778B: Bitwise Formula
3319 Codeforces 778A: String Game
3318 Codeforces 777E: Hanoi Factory
3317 Codeforces 777D: Cloud of Hashtags
3316 Codeforces 777C: Alyona and Spreadsheet
3315 Codeforces 777B: Game of Credit Cards
3314 Codeforces 777A: Shell Game
3313 Codeforces 776G: Sherlock and the Encrypted Data
3312 Codeforces 776F: Sherlock's bet to Moriarty
3311 Codeforces 776E: The Holmes Children
3310 Codeforces 776D: The Door Problem
3309 Codeforces 776C: Molly's Chemicals
3308 Codeforces 776B: Sherlock and his girlfriend
3307 Codeforces 776A: A Serial Killer
3306 Codeforces 775A: University Schedule
3305 Codeforces 774L: Bars
3304 Codeforces 774K: Stepan and Vowels
3303 Codeforces 774J: Stepan's Series
3302 Codeforces 774I: Composing Of String
3301 Codeforces 774H: Repairing Of String
3300 Codeforces 774G: Perfectionist Arkadiy
3299 Codeforces 774F: Pens And Days Of Week
3298 Codeforces 774E: Big Number and Remainder
3297 Codeforces 774D: Lie or Truth
3296 Codeforces 774C: Maximum Number
3295 Codeforces 774B: Significant Cups
3294 Codeforces 774A: Amusement Park
3293 Codeforces 773F: Test Data Generation
3292 Codeforces 773E: Blog Post Rating
3291 Codeforces 773D: Perishable Roads
3290 Codeforces 773C: Prairie Partition
3289 Codeforces 773B: Dynamic Problem Scoring
3288 Codeforces 773A: Success Rate
3287 Codeforces 772E: Verifying Kingdom
3286 Codeforces 772D: Varying Kibibits
3285 Codeforces 772C: Vulnerable Kerbals
3284 Codeforces 772B: Volatile Kite
3283 Codeforces 772A: Voltage Keepsake
3282 Codeforces 771F: Bear and Isomorphic Points
3281 Codeforces 771E: Bear and Rectangle Strips
3280 Codeforces 771D: Bear and Company
3279 Codeforces 771C: Bear and Tree Jumps
3278 Codeforces 771B: Bear and Different Names
3277 Codeforces 771A: Bear and Friendship Condition
3276 Codeforces 770D: Draw Brackets!
3275 Codeforces 770C: Online Courses In BSU
3274 Codeforces 770B: Maximize Sum of Digits
3273 Codeforces 770A: New Password
3272 Codeforces 769D: k-Interesting Pairs Of Integers
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