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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)
4150 Codeforces 976F: Minimal k-covering
4149 Codeforces 976E: Well played!
4148 Codeforces 976D: Degree Set
4147 Codeforces 976C: Nested Segments
4146 Codeforces 976B: Lara Croft and the New Game
4145 Codeforces 976A: Minimum Binary Number
4144 Codeforces 975E: Hag's Khashba
4143 Codeforces 975D: Ghosts
4142 Codeforces 975C: Valhalla Siege
4141 Codeforces 975B: Mancala
4140 Codeforces 975A: Aramic script
4139 Codeforces 967B: Watering System
4138 Codeforces 967A: Mind the Gap
4137 Codeforces 965E: Short Code
4136 Codeforces 965D: Single-use Stones
4135 Codeforces 965C: Greedy Arkady
4134 Codeforces 965B: Battleship
4133 Codeforces 965A: Paper Airplanes
4132 Codeforces 964B: Messages
4131 Codeforces 964A: Splits
4130 Codeforces 963E: Circles of Waiting
4129 Codeforces 963D: Frequency of String
4128 Codeforces 963C: Cutting Rectangle
4127 Codeforces 963B: Destruction of a Tree
4126 Codeforces 963A: Alternating Sum
4125 Codeforces 962G: Visible Black Areas
4124 Codeforces 962F: Simple Cycles Edges
4123 Codeforces 962E: Byteland, Berland and Disputed Cities
4122 Codeforces 962D: Merge Equals
4121 Codeforces 962C: Make a Square
4120 Codeforces 962B: Students in Railway Carriage
4119 Codeforces 962A: Equator
4118 Codeforces 961G: Partitions
4117 Codeforces 961F: k-substrings
4116 Codeforces 961E: Tufurama
4115 Codeforces 961D: Pair Of Lines
4114 Codeforces 961C: Chessboard
4113 Codeforces 961B: Lecture Sleep
4112 Codeforces 961A: Tetris
4111 Codeforces 960H: Santa's Gift
4110 Codeforces 960G: Bandit Blues
4109 Codeforces 960F: Pathwalks
4108 Codeforces 960E: Alternating Tree
4107 Codeforces 960D: Full Binary Tree Queries
4106 Codeforces 960C: Subsequence Counting
4105 Codeforces 960B: Minimize the error
4104 Codeforces 960A: Check the string
4103 Codeforces 959F: Mahmoud and Ehab and yet another xor task
4102 Codeforces 959E: Mahmoud and Ehab and the xor-MST
4101 Codeforces 959D: Mahmoud and Ehab and another array construction task
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