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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)
4800 Codeforces 1106A: Lunar New Year and Cross Counting
4799 Codeforces 1105E: Helping Hiasat
4798 Codeforces 1105D: Kilani and the Game
4797 Codeforces 1105C: Ayoub and Lost Array
4796 Codeforces 1105B: Zuhair and Strings
4795 Codeforces 1105A: Salem and Sticks
4794 Codeforces 1104B: Game with string
4793 Codeforces 1104A: Splitting into digits
4792 Codeforces 1103E: Radix sum
4791 Codeforces 1103D: Professional layer
4790 Codeforces 1103C: Johnny Solving
4789 Codeforces 1103B: Game with modulo
4788 Codeforces 1103A: Grid game
4787 Codeforces 1102F: Elongated Matrix
4786 Codeforces 1102E: Monotonic Renumeration
4785 Codeforces 1102D: Balanced Ternary String
4784 Codeforces 1102C: Doors Breaking and Repairing
4783 Codeforces 1102B: Array K-Coloring
4782 Codeforces 1102A: Integer Sequence Dividing
4781 Codeforces 1101G: (Zero XOR Subset)-less
4780 Codeforces 1101F: Trucks and Cities
4779 Codeforces 1101E: Polycarp's New Job
4778 Codeforces 1101D: GCD Counting
4777 Codeforces 1101C: Division and Union
4776 Codeforces 1101B: Accordion
4775 Codeforces 1101A: Minimum Integer
4774 Codeforces 1100F: Ivan and Burgers
4773 Codeforces 1100E: Andrew and Taxi
4772 Codeforces 1100D: Dasha and Chess
4771 Codeforces 1100C: NN and the Optical Illusion
4770 Codeforces 1100B: Build a Contest
4769 Codeforces 1100A: Roman and Browser
4768 Codeforces 1099F: Cookies
4767 Codeforces 1099C: Postcard
4766 Codeforces 1099B: Squares and Segments
4765 Codeforces 1099A: Snowball
4764 Codeforces 1098F: Ж-function
4763 Codeforces 1098E: Fedya the Potter
4762 Codeforces 1098D: Eels
4761 Codeforces 1098C: Construct a tree
4760 Codeforces 1098B: Nice table
4759 Codeforces 1098A: Sum in the tree
4758 Codeforces 1097H: Mateusz and an Infinite Sequence
4757 Codeforces 1097G: Vladislav and a Great Legend
4756 Codeforces 1097F: Alex and a TV Show
4755 Codeforces 1097E: Egor and an RPG game
4754 Codeforces 1097D: Makoto and a Blackboard
4753 Codeforces 1097C: Yuhao and a Parenthesis
4752 Codeforces 1097B: Petr and a Combination Lock
4751 Codeforces 1097A: Gennady and a Card Game
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