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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)
3350 Codeforces 786D: Rap God
3349 Codeforces 786C: Till I Collapse
3348 Codeforces 786B: Legacy
3347 Codeforces 786A: Berzerk
3346 Codeforces 785E: Anton and Permutation
3345 Codeforces 785D: Anton and School - 2
3344 Codeforces 785C: Anton and Fairy Tale
3343 Codeforces 785B: Anton and Classes
3342 Codeforces 785A: Anton and Polyhedrons
3341 Codeforces 784G: BF Calculator
3340 Codeforces 784F: Crunching Numbers Just for You
3339 Codeforces 784E: Twisted Circuit
3338 Codeforces 784D: Touchy-Feely Palindromes
3337 Codeforces 784C: INTERCALC
3336 Codeforces 784B: Kids' Riddle
3335 Codeforces 784A: Numbers Joke
3334 Codeforces 780H: Intranet of Buses
3333 Codeforces 780G: Andryusha and Nervous Barriers
3332 Codeforces 780F: Axel and Marston in Bitland
3331 Codeforces 780E: Underground Lab
3330 Codeforces 780D: Innokenty and a Football League
3329 Codeforces 780C: Andryusha and Colored Balloons
3328 Codeforces 780B: The Meeting Place Cannot Be Changed
3327 Codeforces 780A: Andryusha and Socks
3326 Codeforces 779C: Dishonest Sellers
3325 Codeforces 779B: Weird Rounding
3324 Codeforces 779A: Pupils Redistribution
3323 Codeforces 778E: Selling Numbers
3322 Codeforces 778D: Parquet Re-laying
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
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