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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)
16805 DMOJ DMOPC '14 Contest 1 P1 - Median Mark
16804 DMOJ DMOPC '13 Contest 3 P5 - A Romantic Dinner
16803 DMOJ DMOPC '13 Contest 3 P4 - Snowman
16802 DMOJ DMOPC '13 Contest 3 P3 - Crossing Field
16801 DMOJ DMOPC '13 Contest 3 P2 - Phone Microwave
16800 DMOJ DMOPC '13 Contest 3 P1 - Sharing is Caring
16799 DMOJ DMOPC '13 Contest 1 P5 - Math on Titan
16798 DMOJ DMOPC '13 Contest 1 P4 - AFK
16797 DMOJ DMOJLand Series: Fake Judges
16796 DMOJ Divisibility Rules
16795 DMOJ Divide and Mod
16794 DMOJ Distinct Shapes
16793 DMOJ Discerning Discounts
16792 DMOJ Please Help Me
16791 DMOJ Digit Sum
16790 DMOJ Digger
16789 DMOJ Detectors
16788 DMOJ Matrix Determinant
16787 DMOJ More German Nouns
16786 DMOJ German Nouns
16785 DMOJ Age Demographic
16784 DMOJ DeMello's Leeches
16783 DMOJ Death Gun
16782 DMOJ Double Doors Regional P6 - Tudor Learns More DDR
16781 DMOJ Double Doors Regional P5 - Tudor Eats Ice Cream Cones
16780 DMOJ Double Doors Regional P4 - Tudor Teaches Jason How To Be Productive
16779 DMOJ Double Doors Regional P3 - Tudor and the Pusheens
16778 DMOJ Double Doors Regional P2 - Tudor Learns DDR
16777 DMOJ Double Doors Regional P1 - Tudor Gets a Goat
16776 DMOJ CTU Open Contest 2018 - Escalators
16775 DMOJ CTU Open Contest 2018 - Moving Furniture
16774 DMOJ CTU Open Contest 2018 - Split Game
16773 DMOJ CTU Open Contest 2018 - Horsemeet
16772 DMOJ CTU Open Contest 2018 - Lighting
16771 DMOJ CTU Open Contest 2018 - Locker Room
16770 DMOJ CTU Open Contest 2018 - Numbers Generator
16769 DMOJ CTU Open Contest 2018 - Rullete
16768 DMOJ CTU Open Contest 2018 - Security Guards
16767 DMOJ CTU Open Contest 2018 - Die
16766 DMOJ CTU Open Contest 2017 - Treetop Walkway
16765 DMOJ CTU Open Contest 2017 - Punching Power
16764 DMOJ CTU Open Contest 2017 - Dark Ride With Monsters
16763 DMOJ CTU Open Contest 2017 - Ice Cream Samples
16762 DMOJ CTU Open Contest 2017 - Shooting Gallery
16761 DMOJ CTU Open Contest 2017 - Forest Picture
16760 DMOJ CTU Open Contest 2017 - Equinox Roller Coaster
16759 DMOJ CTU Open Contest 2017 - Go Northwest!
16758 DMOJ CTU Open Contest 2017 - Chessboard Dancing
16757 DMOJ CTU Open Contest 2017 - Pond Cascade
16756 DMOJ CTU Open Contest 2017 - Amusement Anticipation
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