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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)
8000 Codeforces 1718A1: Burenka and Traditions (easy version)
7999 Codeforces 1717F: Madoka and The First Session
7998 Codeforces 1717E: Madoka and The Best University
7997 Codeforces 1717D: Madoka and The Corruption Scheme
7996 Codeforces 1717C: Madoka and Formal Statement
7995 Codeforces 1717B: Madoka and Underground Competitions
7994 Codeforces 1717A: Madoka and Strange Thoughts
7993 Codeforces 1716F: Bags with Balls
7992 Codeforces 1716E: Swap and Maximum Block
7991 Codeforces 1716D: Chip Move
7990 Codeforces 1716C: Robot in a Hallway
7989 Codeforces 1716B: Permutation Chain
7988 Codeforces 1716A: 2-3 Moves
7987 Codeforces 1715F: Crop Squares
7986 Codeforces 1715E: Long Way Home
7985 Codeforces 1715D: 2+ doors
7984 Codeforces 1715C: Monoblock
7983 Codeforces 1715B: Beautiful Array
7982 Codeforces 1715A: Crossmarket
7981 Codeforces 1714G: Path Prefixes
7980 Codeforces 1714F: Build a Tree and That Is It
7979 Codeforces 1714E: Add Modulo 10
7978 Codeforces 1714D: Color with Occurrences
7977 Codeforces 1714C: Minimum Varied Number
7976 Codeforces 1714B: Remove Prefix
7975 Codeforces 1714A: Everyone Loves to Sleep
7974 Codeforces 1713F: Lost Array
7973 Codeforces 1713E: Cross Swapping
7972 Codeforces 1713D: Tournament Countdown
7971 Codeforces 1713C: Build Permutation
7970 Codeforces 1713B: Optimal Reduction
7969 Codeforces 1713A: Traveling Salesman Problem
7968 Codeforces 1712F: Triameter
7967 Codeforces 1712E2: LCM Sum (hard version)
7966 Codeforces 1712E1: LCM Sum (easy version)
7965 Codeforces 1712D: Empty Graph
7964 Codeforces 1712C: Sort Zero
7963 Codeforces 1712B: Woeful Permutation
7962 Codeforces 1712A: Wonderful Permutation
7961 Codeforces 1711B: Party
7960 Codeforces 1711A: Perfect Permutation
7959 Codeforces 1710E: Two Arrays
7958 Codeforces 1710D: Recover the Tree
7957 Codeforces 1710C: XOR Triangle
7956 Codeforces 1710B: Rain
7955 Codeforces 1710A: Color the Picture
7954 Codeforces 1709F: Multiset of Strings
7953 Codeforces 1709E: XOR Tree
7952 Codeforces 1709D: Rorororobot
7951 Codeforces 1709C: Recover an RBS
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