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Over 20,000 problems available: AMC 8/10/12 and AIME problems from 2010-2024; USAJMO/USAMO problems from 2002-2024; USACO problems from 2014 to 2024 (all divisions); all Codeforces, AtCoder and DMOJ problems. If you leave the search field blank, it returns all problems with the specified type.

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  • AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
  • AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
  • AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
  • AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
  • USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
  • Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
  • AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
  • DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
  • USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
3400 Codeforces 799B: T-shirt buying
3399 Codeforces 799A: Carrot Cakes
3398 Codeforces 798E: Mike and code of a permutation
3397 Codeforces 798D: Mike and distribution
3396 Codeforces 798C: Mike and gcd problem
3395 Codeforces 798B: Mike and strings
3394 Codeforces 798A: Mike and palindrome
3393 Codeforces 797F: Mice and Holes
3392 Codeforces 797E: Array Queries
3391 Codeforces 797D: Broken BST
3390 Codeforces 797C: Minimal string
3389 Codeforces 797B: Odd sum
3388 Codeforces 797A: k-Factorization
3387 Codeforces 796F: Sequence Recovery
3386 Codeforces 796E: Exam Cheating
3385 Codeforces 796D: Police Stations
3384 Codeforces 796C: Bank Hacking
3383 Codeforces 796B: Find The Bone
3382 Codeforces 796A: Buying A House
3381 Codeforces 794G: Replace All
3380 Codeforces 794F: Leha and security system
3379 Codeforces 794E: Choosing Carrot
3378 Codeforces 794D: Labelling Cities
3377 Codeforces 794C: Naming Company
3376 Codeforces 794B: Cutting Carrot
3375 Codeforces 794A: Bank Robbery
3374 Codeforces 793G: Oleg and chess
3373 Codeforces 793F: Julia the snail
3372 Codeforces 793E: Problem of offices
3371 Codeforces 793D: Presents in Bankopolis
3370 Codeforces 793C: Mice problem
3369 Codeforces 793B: Igor and his way to work
3368 Codeforces 793A: Oleg and shares
3367 Codeforces 792F: Mages and Monsters
3366 Codeforces 792E: Colored Balls
3365 Codeforces 792D: Paths in a Complete Binary Tree
3364 Codeforces 792C: Divide by Three
3363 Codeforces 792B: Counting-out Rhyme
3362 Codeforces 792A: New Bus Route
3361 Codeforces 791A: Bear and Big Brother
3360 Codeforces 789B: Masha and geometric depression
3359 Codeforces 789A: Anastasia and pebbles
3358 Codeforces 788E: New task
3357 Codeforces 788D: Finding lines
3356 Codeforces 788C: The Great Mixing
3355 Codeforces 788B: Weird journey
3354 Codeforces 788A: Functions again
3353 Codeforces 787B: Not Afraid
3352 Codeforces 787A: The Monster
3351 Codeforces 786E: ALT
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