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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)
1700 Codeforces 386B: Fly, freebies, fly!
1699 Codeforces 386A: Second-Price Auction
1698 Codeforces 385E: Bear in the Field
1697 Codeforces 385D: Bear and Floodlight
1696 Codeforces 385C: Bear and Prime Numbers
1695 Codeforces 385B: Bear and Strings
1694 Codeforces 385A: Bear and Raspberry
1693 Codeforces 384B: Multitasking
1692 Codeforces 384A: Coder
1691 Codeforces 383E: Vowels
1690 Codeforces 383D: Antimatter
1689 Codeforces 383C: Propagating tree
1688 Codeforces 383B: Volcanoes
1687 Codeforces 383A: Milking cows
1686 Codeforces 382E: Ksenia and Combinatorics
1685 Codeforces 382D: Ksenia and Pawns
1684 Codeforces 382C: Arithmetic Progression
1683 Codeforces 382B: Number Busters
1682 Codeforces 382A: Ksenia and Pan Scales
1681 Codeforces 381B: Sereja and Stairs
1680 Codeforces 381A: Sereja and Dima
1679 Codeforces 380E: Sereja and Dividing
1678 Codeforces 380D: Sereja and Cinema
1677 Codeforces 380C: Sereja and Brackets
1676 Codeforces 380B: Sereja and Tree
1675 Codeforces 380A: Sereja and Prefixes
1674 Codeforces 379G: New Year Cactus
1673 Codeforces 379F: New Year Tree
1672 Codeforces 379E: New Year Tree Decorations
1671 Codeforces 379D: New Year Letter
1670 Codeforces 379C: New Year Ratings Change
1669 Codeforces 379B: New Year Present
1668 Codeforces 379A: New Year Candles
1667 Codeforces 378B: Semifinals
1666 Codeforces 378A: Playing with Dice
1665 Codeforces 377E: Cookie Clicker
1664 Codeforces 377D: Developing Game
1663 Codeforces 377C: Captains Mode
1662 Codeforces 377B: Preparing for the Contest
1661 Codeforces 377A: Maze
1660 Codeforces 376B: I.O.U.
1659 Codeforces 376A: Lever
1658 Codeforces 375E: Red and Black Tree
1657 Codeforces 375D: Tree and Queries
1656 Codeforces 375C: Circling Round Treasures
1655 Codeforces 375B: Maximum Submatrix 2
1654 Codeforces 375A: Divisible by Seven
1653 Codeforces 374E: Inna and Babies
1652 Codeforces 374D: Inna and Sequence
1651 Codeforces 374C: Inna and Dima
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