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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)
6650 Codeforces 1471B: Strange List
6649 Codeforces 1471A: Strange Partition
6648 Codeforces 1470F: Strange Covering
6647 Codeforces 1470E: Strange Permutation
6646 Codeforces 1470D: Strange Housing
6645 Codeforces 1470C: Strange Shuffle
6644 Codeforces 1470B: Strange Definition
6643 Codeforces 1470A: Strange Birthday Party
6642 Codeforces 1469F: Power Sockets
6641 Codeforces 1469E: A Bit Similar
6640 Codeforces 1469D: Ceil Divisions
6639 Codeforces 1469C: Building a Fence
6638 Codeforces 1469B: Red and Blue
6637 Codeforces 1469A: Regular Bracket Sequence
6636 Codeforces 1468N: Waste Sorting
6635 Codeforces 1468M: Similar Sets
6634 Codeforces 1468L: Prime Divisors Selection
6633 Codeforces 1468K: The Robot
6632 Codeforces 1468J: Road Reform
6631 Codeforces 1468I: Plane Tiling
6630 Codeforces 1468H: K and Medians
6629 Codeforces 1468G: Hobbits
6628 Codeforces 1468F: Full Turn
6627 Codeforces 1468E: Four Segments
6626 Codeforces 1468D: Firecrackers
6625 Codeforces 1468C: Berpizza
6624 Codeforces 1468B: Bakery
6623 Codeforces 1468A: LaIS
6622 Codeforces 1467E: Distinctive Roots in a Tree
6621 Codeforces 1467D: Sum of Paths
6620 Codeforces 1467C: Three Bags
6619 Codeforces 1467B: Hills And Valleys
6618 Codeforces 1467A: Wizard of Orz
6617 Codeforces 1466I: The Riddle of the Sphinx
6616 Codeforces 1466H: Finding satisfactory solutions
6615 Codeforces 1466G: Song of the Sirens
6614 Codeforces 1466F: Euclid's nightmare
6613 Codeforces 1466E: Apollo versus Pan
6612 Codeforces 1466D: 13th Labour of Heracles
6611 Codeforces 1466C: Canine poetry
6610 Codeforces 1466B: Last minute enhancements
6609 Codeforces 1466A: Bovine Dilemma
6608 Codeforces 1464F: My Beautiful Madness
6607 Codeforces 1463F: Max Correct Set
6606 Codeforces 1463E: Plan of Lectures
6605 Codeforces 1463D: Pairs
6604 Codeforces 1463C: Busy Robot
6603 Codeforces 1463B: Find The Array
6602 Codeforces 1463A: Dungeon
6601 Codeforces 1462F: The Treasure of The Segments
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