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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)
15305 DMOJ Back From Summer '17 P3: Basketball Dodgeball
15304 DMOJ Back From Summer '17 P2: Crayola Lightsaber
15303 DMOJ Back From Summer '17 P1: Pithy Pastimes
15302 DMOJ String Finding - Hacking
15301 DMOJ String Finding
15300 DMOJ Next Prime (Hard)
15299 DMOJ Next Prime
15298 DMOJ Lexicographically Least Substring (Hard)
15297 DMOJ Lexicographically Least Substring
15296 DMOJ List Minimum (Harder)
15295 DMOJ List Minimum (Hard)
15294 DMOJ List Minimum (Easy)
15293 DMOJ List Minimum
15292 DMOJ Big Deposits
15291 DMOJ Bubble Cup V11 A Splitting Money
15290 DMOJ Bubble Cup V9 I R3D3's summer adventure
15289 DMOJ Bubble Cup V9 G Heroes of Making Magic III
15288 DMOJ Bubble Cup V9 F Pokermon League challenge
15287 DMOJ Bubble Cup V9 E Festival organization
15286 DMOJ Bubble Cup V9 D Potions homework
15285 DMOJ Bubble Cup V9 C Paint it really, really black
15284 DMOJ Bubble Cup V9 B Underfail
15283 DMOJ Bubble Cup V9 A Cowboy Beblop at his computer
15282 DMOJ Bubble Cup V8 I Robots protection
15281 DMOJ Bubble Cup V8 H Bots
15280 DMOJ Bubble Cup V8 G Run for beer
15279 DMOJ Bubble Cup V8 F Bulbo
15278 DMOJ Bubble Cup V8 E Spectator Riots
15277 DMOJ Bubble Cup V8 D Tablecity
15276 DMOJ Bubble Cup V8 C Party
15275 DMOJ Bubble Cup V8 B Bribes
15274 DMOJ Bubble Cup V8 A Fibonotci
15273 DMOJ ICPC BAPC 2021 G - Gyrating Glyphs
15272 DMOJ Bank Notes
15271 DMOJ Bad Paths
15270 DMOJ Palindromic Integer Partition
15269 DMOJ Adding Reversed Numbers
15268 DMOJ Avocado Trees!
15267 DMOJ PEG Test '14 - Water
15266 DMOJ PEG Test '14 - Spirits
15265 DMOJ PEG Test '14 - Fire
15264 DMOJ PEG Test '14 - Earth
15263 DMOJ PEG Test '14 - Change
15262 DMOJ PEG Test '14 - Balance
15261 DMOJ PEG Test '14 - Air
15260 DMOJ Attraction
15259 DMOJ A Times B
15258 DMOJ Athena on Zanzibar Island
15257 DMOJ A Sum Problem
15256 DMOJ A Simple Multiplication
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