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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)
17755 DMOJ Google Code Jam '13 Qualification Round Problem B - Lawnmower
17754 DMOJ Google Code Jam '13 Qualification Round Problem A - Tic-Tac-Toe-Tomek
17753 DMOJ Google Code Jam '12 Round 1A Problem C - Cruise Control
17752 DMOJ Google Code Jam '12 Round 1A Problem B - Kingdom Rush
17751 DMOJ Google Code Jam '12 Round 1A Problem A - Password Problem
17750 DMOJ Google Code Jam '12 Qualification Round Problem D - Hall of Mirrors
17749 DMOJ Google Code Jam '12 Qualification Round Problem C - Recycled Numbers
17748 DMOJ Google Code Jam '12 Qualification Round Problem B - Dancing With the Googlers
17747 DMOJ Google Code Jam '12 Qualification Round Problem A - Speaking in Tongues
17746 DMOJ Google Code Jam '11 Round 1A Problem C - Pseudominion
17745 DMOJ Google Code Jam '11 Round 1A Problem B - The Killer Word
17744 DMOJ Google Code Jam '11 Round 1A Problem A - FreeCell Statistics
17743 DMOJ Google Code Jam '11 Qualification Round Problem D - GoroSort
17742 DMOJ Google Code Jam '11 Qualification Round Problem C - Magicka
17741 DMOJ Google Code Jam '11 Qualification Round Problem B - Candy Splitting
17740 DMOJ Google Code Jam '11 Qualification Round Problem A - Bot Trust
17739 DMOJ Google Code Jam '10 Round 1A Problem C - Number Game
17738 DMOJ Google Code Jam '10 Round 1A Problem B - Make it Smooth
17737 DMOJ Google Code Jam '10 Round 1A Problem A - Rotate
17736 DMOJ Google Code Jam '10 Qualification Round Problem C - Theme Park
17735 DMOJ Google Code Jam '10 Qualification Round Problem B - Snapper Chain
17734 DMOJ Google Code Jam '10 Qualification Round Problem A - Fair Warning
17733 DMOJ Google Code Jam '09 Round 1A Problem C - Collecting Cards
17732 DMOJ Google Code Jam '09 Round 1A Problem B - Crossing the Road
17731 DMOJ Google Code Jam '09 Round 1A Problem A - Multi-base happiness
17730 DMOJ Google Code Jam '09 Qualification Round Problem C - Welcome to Code Jam
17729 DMOJ Google Code Jam '09 Qualification Round Problem B - Watersheds
17728 DMOJ Google Code Jam '09 Qualification Round Problem A - Alien Language
17727 DMOJ Google Code Jam '08 Round 1A Problem C - Numbers
17726 DMOJ Google Code Jam '08 Round 1A Problem B - Milkshakes
17725 DMOJ Google Code Jam '08 Round 1A Problem A - Minimum Scalar Product
17724 DMOJ Google Code Jam '08 Qualification Round Problem C - Train Timetable
17723 DMOJ Google Code Jam '08 Qualification Round Problem B - Saving the Universe
17722 DMOJ Google Code Jam '08 Qualification Round Problem A - Fly Swatter
17721 DMOJ GCC '16 P3 - Hang Gliding Fun
17720 DMOJ GCC '16 P2 - Classified Documents
17719 DMOJ GCC '16 P1 - Watching Anime
17718 DMOJ The Game of Nim
17717 DMOJ PEG Test '11 - Cyclopian Puzzle
17716 DMOJ PEG Test '11 - Cyclopian Census
17715 DMOJ PEG Test '11 - Cyclopian Cash
17714 DMOJ PEG Test '11 - Cyclopian Suits
17713 DMOJ PEG Test '11 - Cyclopian Air
17712 DMOJ Angie and Functions (Hard)
17711 DMOJ Flip the Switches
17710 DMOJ Imperative French
17709 DMOJ The Fox and the Wolf
17708 DMOJ Foxlings
17707 DMOJ Anti-Fire Fox
17706 DMOJ A Floyd-Warshall Problem
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