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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)
19555 DMOJ WC '15 Contest 2 S1 - The Phantom Menace
19554 DMOJ WC '15 Contest 2 J4 - The Force Awakens (Junior)
19553 DMOJ WC '15 Contest 2 J3 - Return of the Jedi
19552 DMOJ WC '15 Contest 2 J2 - The Empire Strikes Back
19551 DMOJ WC '15 Contest 2 J1 - A New Hope
19550 DMOJ WC '15 Contest 1 S4 - Chocolate Milk
19549 DMOJ WC '15 Contest 1 S3 - Contest Sites
19548 DMOJ WC '15 Contest 1 S2 - Wildcat Wildcards
19547 DMOJ WC '15 Contest 1 S1 - Woburn Workload
19546 DMOJ WC '15 Contest 1 J4 - Trip Budgeting
19545 DMOJ WC '15 Contest 1 J3 - Jazz Concert
19544 DMOJ WC '15 Contest 1 J2 - Grouping Recruits
19543 DMOJ WC '15 Contest 1 J1 - Do You Know Your Woburn Colours?
19542 DMOJ WC '07 P5 - BitStrings
19541 DMOJ WC '07 P4 - Drain Game
19540 DMOJ WC '07 P3 - Strategy Meeting
19539 DMOJ WC '02 Suicidal P5 - The Mines of Moria
19538 DMOJ WC '02 Suicidal P4 - The Spell of Lord Ruru
19537 DMOJ WC '02 Suicidal P3 - Evil Tasks
19536 DMOJ WC '02 Suicidal P2 - Klingon Roulette
19535 DMOJ WC '02 Suicidal P1 - Dark Lord
19534 DMOJ WC '02 P9 - A Nerd's Preparation
19533 DMOJ WC '02 P8 - Deploying Troops
19532 DMOJ WC '02 P7 - Old Macdonald's Farm
19531 DMOJ WC '02 P6 - Obstacles Galore
19530 DMOJ WC '02 P5 - Intercepted Cowmmunication
19529 DMOJ WC '02 P4 - It's Party Time
19528 DMOJ WC '02 P3 - The Big Book of Recipes
19527 DMOJ WC '02 P2 - Cow-bot
19526 DMOJ WC '02 P10 - The Final Battle
19525 DMOJ WC '02 P1 - A Planning Session
19524 DMOJ WC '01 Suicidal P6 - Blind Date
19523 DMOJ WC '01 Suicidal P5 - The Mole
19522 DMOJ WC '01 Suicidal P4 - Big Brother
19521 DMOJ WC '01 Suicidal P3 - Regis
19520 DMOJ WC '01 Suicidal P2 - Temptation Island
19519 DMOJ WC '01 Suicidal P1 - Survivor
19518 DMOJ WC '01 P9 - The Thirteenth Floor
19517 DMOJ WC '01 P8 - Time to Get Medieval
19516 DMOJ WC '01 P7 - The Sixth Sense
19515 DMOJ WC '01 P6 - Mission Impossible 3
19514 DMOJ WC '01 P5 - The Man With The Golden Eye
19513 DMOJ WC '01 P4 - Cool Runnings
19512 DMOJ WC '01 P3 - Back to the Future
19511 DMOJ WC '01 P2 - The Island Of Dr. Strangelove
19510 DMOJ WC '01 P1 - The Rock
19509 DMOJ Waterloo 2023 Winter E - Colourful Tree
19508 DMOJ Waterloo 2023 Winter D - Link-Cut Tree
19507 DMOJ Waterloo 2023 Winter C - Sandpile on Clique
19506 DMOJ Waterloo 2023 Winter B - Laser Trap
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