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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)
13505 AtCoder MATH-AND-ALGORITHM: 034. Nearest Points
13504 AtCoder MATH-AND-ALGORITHM: 033. Distance
13503 AtCoder MATH-AND-ALGORITHM: 032. Binary Search
13502 AtCoder MATH-AND-ALGORITHM: 031. Taro's Vacation
13501 AtCoder MATH-AND-ALGORITHM: 029. Climb Stairs
13500 AtCoder MATH-AND-ALGORITHM: 027. Sorting
13499 AtCoder MATH-AND-ALGORITHM: 001. Print 5+N
13498 AtCoder M-SOLUTIONS2020: F. Air Safety
13497 AtCoder M-SOLUTIONS2020: E. M's Solution
13496 AtCoder M-SOLUTIONS2020: D. Road to Millionaire
13495 AtCoder M-SOLUTIONS2020: C. Marks
13494 AtCoder M-SOLUTIONS2020: B. Magic 2
13493 AtCoder M-SOLUTIONS2020: A. Kyu in AtCoder
13492 AtCoder M-SOLUTIONS2019: F. Random Tournament
13491 AtCoder M-SOLUTIONS2019: E. Product of Arithmetic Progression
13490 AtCoder M-SOLUTIONS2019: D. Maximum Sum of Minimum
13489 AtCoder M-SOLUTIONS2019: C. Best-of-(2n-1)
13488 AtCoder M-SOLUTIONS2019: B. Sumo
13487 AtCoder M-SOLUTIONS2019: A. Sum of Interior Angles
13486 AtCoder LOADCHECKING: A. 好きな順列
13485 AtCoder KUPC2021: M. Formula
13484 AtCoder KUPC2021: L. Tag Game
13483 AtCoder KUPC2021: K. Three Coloring
13482 AtCoder KUPC2021: J. Delete Balls
13481 AtCoder KUPC2021: I. Good LACK
13480 AtCoder KUPC2021: H. Symmetric
13479 AtCoder KUPC2021: G. Two Step Sort
13478 AtCoder KUPC2021: F. One Yen Coin
13477 AtCoder KUPC2021: E. PERMST
13476 AtCoder KUPC2021: D. Stones
13475 AtCoder KUPC2021: C. Gacha
13474 AtCoder KUPC2021: B. Painting with Many Orders
13473 AtCoder KUPC2021: A. Standing Sign
13472 AtCoder KUPC2020: M. Many Parentheses
13471 AtCoder KUPC2020: L. Inside Story of Median Query
13470 AtCoder KUPC2020: K. Deleting Edges
13469 AtCoder KUPC2020: J. Median Query
13468 AtCoder KUPC2020: I. Coloring Paths
13467 AtCoder KUPC2020: H. Beans on the Grid
13466 AtCoder KUPC2020: G. Counting Angels
13465 AtCoder KUPC2020: F. GRIDMST
13464 AtCoder KUPC2020: E. Sequence Partitioning
13463 AtCoder KUPC2020: D. Stick Combination
13462 AtCoder KUPC2020: C. Grid and Substrings
13461 AtCoder KUPC2020: B. Numbers on Papers
13460 AtCoder KUPC2020: A. Classroom Distance
13459 AtCoder KUPC2019: L. タケノコ
13458 AtCoder KUPC2019: K. One or All
13457 AtCoder KUPC2019: J. Link-cut tworee
13456 AtCoder KUPC2019: I. encode/decode 2019
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