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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)
24805 DMOJ COCI '23 Contest 3 #2 Vrsar
24804 DMOJ COCI '23 Contest 3 #1 Eurokod
24803 DMOJ Mock CCC '24 Contest 1 S2 - Owen the Toucan
24802 DMOJ Mock CCC '24 Contest 1 S5 - Mock CCC 2025
24801 DMOJ Mock CCC '24 Contest 1 J3 - RGB Words
24800 DMOJ Mock CCC '24 Contest 1 J5 - Mathland
24799 DMOJ Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand
24798 DMOJ Mock CCC '24 Contest 1 S3 - Optimal Split Point
24797 DMOJ Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles
24796 DMOJ Mock CCC '24 Contest 1 J1 - Lemon Bathtub
24795 DMOJ Yet Another Contest 3 P3 - Topography
24794 DMOJ Mock CCC '24 Contest 1 J2 - Simple Elo Rating System
24793 AtCoder JOIG2024-OPEN: F. 感染シミュレーション (Infection Simulation)
24792 AtCoder JOIG2024-OPEN: E. 名前 (Name)
24791 AtCoder JOIG2024-OPEN: D. たくさんの数字 (Many Digits)
24790 AtCoder JOIG2024-OPEN: C. 座席 2 (Seats 2)
24789 AtCoder JOIG2024-OPEN: B. ダンス (Dance)
24788 AtCoder JOIG2024-OPEN: A. 三連続 (Three Consecutive)
24787 AtCoder ABC338: G. evall
24786 AtCoder ABC338: F. Negative Traveling Salesman
24785 AtCoder ABC338: E. Chords
24784 AtCoder ABC338: D. Island Tour
24783 AtCoder ABC338: C. Leftover Recipes
24782 AtCoder ABC338: B. Frequency
24781 AtCoder ABC338: A. Capitalized?
24780 Codeforces 1925D: Good Trip
24779 Codeforces 1925B: A Balanced Problemset?
24778 Codeforces 1925A: We Got Everything Covered!
24777 Codeforces 1924F: Anti-Proxy Attendance
24776 Codeforces 1924E: Paper Cutting Again
24775 Codeforces 1924D: Balanced Subsequences
24774 Codeforces 1924C: Fractal Origami
24773 Codeforces 1924B: Space Harbour
24772 Codeforces 1924A: Did We Get Everything Covered?
24771 USACO 2023 December Contest, Bronze: Farmer John Actually Farms
24770 USACO 2023 December Contest, Bronze: Cowntact Tracing 2
24769 USACO 2023 December Contest, Bronze: Candy Cane Feast
24768 USACO 2023 December Contest, Silver: Target Practice
24767 USACO 2023 December Contest, Silver: Cycle Correspondence
24766 USACO 2023 December Contest, Silver: Bovine Acrobatics
24765 USACO 2023 December Contest, Gold: Haybale Distribution
24764 USACO 2023 December Contest, Gold: Minimum Longest Trip
24763 USACO 2023 December Contest, Gold: Flight Routes
24762 USACO 2023 December Contest, Platinum: Train Scheduling
24761 USACO 2023 December Contest, Platinum: A Graph Problem
24760 USACO 2023 December Contest, Platinum: Cowntact Tracing
24759 DMOJ Triangles
24758 DMOJ WOSS Dual Olympiad 2023 S2: Geese Attack
24757 DMOJ WOSS Dual Olympiad 2023 Team Round P3: Choosing Edges
24756 DMOJ WOSS Dual Olympiad 2023 J2: 3 Numbers
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