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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)
3900 Codeforces 915A: Garden
3899 Codeforces 914H: Ember and Storm's Tree Game
3898 Codeforces 914G: Sum the Fibonacci
3897 Codeforces 914F: Substrings in a String
3896 Codeforces 914E: Palindromes in a Tree
3895 Codeforces 914D: Bash and a Tough Math Puzzle
3894 Codeforces 914C: Travelling Salesman and Special Numbers
3893 Codeforces 914B: Conan and Agasa play a Card Game
3892 Codeforces 914A: Perfect Squares
3891 Codeforces 913H: Don't Exceed
3890 Codeforces 913G: Power Substring
3889 Codeforces 913F: Strongly Connected Tournament
3888 Codeforces 913E: Logical Expression
3887 Codeforces 913D: Too Easy Problems
3886 Codeforces 913C: Party Lemonade
3885 Codeforces 913B: Christmas Spruce
3884 Codeforces 913A: Modular Exponentiation
3883 Codeforces 912E: Prime Gift
3882 Codeforces 912D: Fishes
3881 Codeforces 912C: Perun, Ult!
3880 Codeforces 912B: New Year's Eve
3879 Codeforces 912A: Tricky Alchemy
3878 Codeforces 911G: Mass Change Queries
3877 Codeforces 911F: Tree Destruction
3876 Codeforces 911E: Stack Sorting
3875 Codeforces 911D: Inversion Counting
3874 Codeforces 911C: Three Garlands
3873 Codeforces 911B: Two Cakes
3872 Codeforces 911A: Nearest Minimums
3871 Codeforces 910C: Minimum Sum
3870 Codeforces 910B: Door Frames
3869 Codeforces 910A: The Way to Home
3868 Codeforces 909F: AND-permutations
3867 Codeforces 909E: Coprocessor
3866 Codeforces 909D: Colorful Points
3865 Codeforces 909C: Python Indentation
3864 Codeforces 909B: Segments
3863 Codeforces 909A: Generate Login
3862 Codeforces 908H: New Year and Boolean Bridges
3861 Codeforces 908G: New Year and Original Order
3860 Codeforces 908F: New Year and Rainbow Roads
3859 Codeforces 908E: New Year and Entity Enumeration
3858 Codeforces 908D: New Year and Arbitrary Arrangement
3857 Codeforces 908C: New Year and Curling
3856 Codeforces 908B: New Year and Buggy Bot
3855 Codeforces 908A: New Year and Counting Cards
3854 Codeforces 907B: Tic-Tac-Toe
3853 Codeforces 907A: Masha and Bears
3852 Codeforces 906E: Reverses
3851 Codeforces 906D: Power Tower
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