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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)
4600 Codeforces 1067A: Array Without Local Maximums
4599 Codeforces 1066F: Yet another 2D Walking
4598 Codeforces 1066E: Binary Numbers AND Sum
4597 Codeforces 1066D: Boxes Packing
4596 Codeforces 1066C: Books Queries
4595 Codeforces 1066B: Heaters
4594 Codeforces 1066A: Vova and Train
4593 Codeforces 1065G: Fibonacci Suffix
4592 Codeforces 1065F: Up and Down the Tree
4591 Codeforces 1065E: Side Transmutations
4590 Codeforces 1065D: Three Pieces
4589 Codeforces 1065C: Make It Equal
4588 Codeforces 1065B: Vasya and Isolated Vertices
4587 Codeforces 1065A: Vasya and Chocolate
4586 Codeforces 1064B: Equations of Mathematical Magic
4585 Codeforces 1064A: Make a triangle!
4584 Codeforces 1063F: String Journey
4583 Codeforces 1063E: Lasers and Mirrors
4582 Codeforces 1063D: Candies for Children
4581 Codeforces 1063C: Dwarves, Hats and Extrasensory Abilities
4580 Codeforces 1063B: Labyrinth
4579 Codeforces 1063A: Oh Those Palindromes
4578 Codeforces 1062F: Upgrading Cities
4577 Codeforces 1062E: Company
4576 Codeforces 1062D: Fun with Integers
4575 Codeforces 1062C: Banh-mi
4574 Codeforces 1062B: Math
4573 Codeforces 1062A: A Prank
4572 Codeforces 1061F: Lost Root
4571 Codeforces 1061E: Politics
4570 Codeforces 1061D: TV Shows
4569 Codeforces 1061C: Multiplicity
4568 Codeforces 1061B: Views Matter
4567 Codeforces 1061A: Coins
4566 Codeforces 1060H: Sophisticated Device
4565 Codeforces 1060G: Balls and Pockets
4564 Codeforces 1060F: Shrinking Tree
4563 Codeforces 1060E: Sergey and Subway
4562 Codeforces 1060D: Social Circles
4561 Codeforces 1060C: Maximum Subrectangle
4560 Codeforces 1060B: Maximum Sum of Digits
4559 Codeforces 1060A: Phone Numbers
4558 Codeforces 1059E: Split the Tree
4557 Codeforces 1059D: Nature Reserve
4556 Codeforces 1059C: Sequence Transformation
4555 Codeforces 1059B: Forgery
4554 Codeforces 1059A: Cashier
4553 Codeforces 1057C: Tanya and Colored Candies
4552 Codeforces 1057B: DDoS
4551 Codeforces 1057A: Bmail Computer Network
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