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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)
19455 DMOJ Wesley's Anger Contest 5 Problem 1 - Matryoshka Acorns
19454 DMOJ Wesley's Anger Contest 4 Problem 7 - Squirrel Cities
19453 DMOJ Wesley's Anger Contest 4 Problem 6 - Hungry Squirrels
19452 DMOJ Wesley's Anger Contest 4 Problem 5 - Time Travelling Squirrels
19451 DMOJ Wesley's Anger Contest 4 Problem 4 - The Almighty Acorn
19450 DMOJ Wesley's Anger Contest 4 Problem 3 - Squirrel Tag
19449 DMOJ Wesley's Anger Contest 4 Problem 2 - Squirrel Election
19448 DMOJ Wesley's Anger Contest 4 Problem 1 - Zeyu's Zany Zort
19447 DMOJ Wesley's Anger Contest 3 Problem 7 - Mirrors
19446 DMOJ Wesley's Anger Contest 3 Problem 6 - Zeyu's Sadness Contest 1
19445 DMOJ Wesley's Anger Contest 3 Problem 5 - Triangle: The Root of All Evil
19444 DMOJ Wesley's Anger Contest 3 Problem 4 - Canadian Construction Crew
19443 DMOJ Wesley's Anger Contest 3 Problem 3 - Wesley Plays DDR
19442 DMOJ Wesley's Anger Contest 3 Problem 2 - Eat, Sleep, Code, Repeat
19441 DMOJ Wesley's Anger Contest 3 Problem 1 - Snow Day Predictor
19440 DMOJ Wesley's Anger Contest 3 Bonus Problem - Game of Death
19439 DMOJ Wesley's Anger Contest 2 Problem 6 - Haunted Houses
19438 DMOJ Wesley's Anger Contest 2 Problem 5 - Oober Treats
19437 DMOJ Wesley's Anger Contest 2 Problem 4 - The Ninth Triangle of the Underworld
19436 DMOJ Wesley's Anger Contest 2 Problem 3 - Pumpkin Counting
19435 DMOJ Wesley's Anger Contest 2 Problem 2 - Costume Shopping
19434 DMOJ Wesley's Anger Contest 2 Problem 1 - OCT 31 = DEC 25?
19433 DMOJ Wesley's Anger Contest 1 Problem 7 - Arithmetic Subtrees
19432 DMOJ Wesley's Anger Contest 1 Problem 6 - Colourful Cactus Ordeal
19431 DMOJ Wesley's Anger Contest 1 Problem 5 - Rule of Four
19430 DMOJ Wesley's Anger Contest 1 Problem 4 (Hard Version) - A Red-Black Tree Problem
19429 DMOJ Wesley's Anger Contest 1 Problem 4 (Easy Version) - A Red-Black Tree Problem
19428 DMOJ Wesley's Anger Contest 1 Problem 3 - A Dynamic Tree Problem
19427 DMOJ Wesley's Anger Contest 1 Problem 2 - A Minimum Cost Flow Problem
19426 DMOJ Wesley's Anger Contest 1 Problem 1 - Simply a Simple Simplex Problem
19425 DMOJ VPEX P5 - Points Redistribution
19424 DMOJ VPEX P4 - Etopika
19423 DMOJ VPEX P3 - Coding Club
19422 DMOJ VPEX P2 - Darcy Parties
19421 DMOJ VPEX P1 - War on Two Fronts
19420 DMOJ VPEX P0 - Pizza
19419 DMOJ VM7WC '16 #6 Gold - Cold War Telecom
19418 DMOJ VM7WC '16 #6 Silver - Diana Socializes
19417 DMOJ VM7WC '16 #6 Bronze - The Most Important Skill in Biology
19416 DMOJ VM7WC '16 #5 Silver - Jayden Eats Chocolate
19415 DMOJ VM7WC '16 #5 Gold - Jayden Studies Trees
19414 DMOJ VM7WC '16 #5 Silver - Jayden Plays Video Games
19413 DMOJ VM7WC '16 #5 Bronze - Jayden Watches Videos
19412 DMOJ VM7WC '16 #4 Gold - Restoring Reputation
19411 DMOJ VM7WC '16 #4 Silver - Tests or Test Cases?
19410 DMOJ VM7WC '16 #4 Bronze - Perfect Squares for Not-So-Perfect Cases
19409 DMOJ VM7WC '16 #3 Gold - Hello, Officer.
19408 DMOJ VM7WC '16 #3 Silver - Can Shahir even get there?!
19407 DMOJ VM7WC '16 #3 Bronze - Shahir-in-a-Box
19406 DMOJ VM7WC '16 #2 Gold - GGG
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