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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)
750 Codeforces 160A: Twins
749 Codeforces 159E: Zebra Tower
748 Codeforces 159D: Palindrome pairs
747 Codeforces 159C: String Manipulation 1.0
746 Codeforces 159B: Matchmaker
745 Codeforces 159A: Friends or Not
744 Codeforces 158E: Phone Talks
743 Codeforces 158D: Ice Sculptures
742 Codeforces 158C: Cd and pwd commands
741 Codeforces 158B: Taxi
740 Codeforces 158A: Next Round
739 Codeforces 157B: Trace
738 Codeforces 157A: Game Outcome
737 Codeforces 156E: Mrs. Hudson's Pancakes
736 Codeforces 156D: Clues
735 Codeforces 156C: Cipher
734 Codeforces 156B: Suspects
733 Codeforces 156A: Message
732 Codeforces 155B: Combination
731 Codeforces 155A: I_love_\%username\%
730 Codeforces 154E: Martian Colony
729 Codeforces 154D: Flatland Fencing
728 Codeforces 154C: Double Profiles
727 Codeforces 154B: Colliders
726 Codeforces 154A: Hometask
725 Codeforces 153E: Euclidean Distance
724 Codeforces 153D: Date Change
723 Codeforces 153C: Caesar Cipher
722 Codeforces 153B: Binary notation
721 Codeforces 153A: A + B
720 Codeforces 152E: Garden
719 Codeforces 152D: Frames
718 Codeforces 152C: Pocket Book
717 Codeforces 152B: Steps
716 Codeforces 152A: Marks
715 Codeforces 151B: Phone Numbers
714 Codeforces 151A: Soft Drinking
713 Codeforces 150E: Freezing with Style
712 Codeforces 150D: Mission Impassable
711 Codeforces 150C: Smart Cheater
710 Codeforces 150B: Quantity of Strings
709 Codeforces 150A: Win or Freeze
708 Codeforces 149E: Martian Strings
707 Codeforces 149D: Coloring Brackets
706 Codeforces 149C: Division into Teams
705 Codeforces 149B: Martian Clock
704 Codeforces 149A: Business trip
703 Codeforces 148E: Porcelain
702 Codeforces 148D: Bag of mice
701 Codeforces 148C: Terse princess
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