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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)
3000 Codeforces 711B: Chris and Magic Square
2999 Codeforces 711A: Bus to Udayland
2998 Codeforces 710F: String Set Queries
2997 Codeforces 710E: Generate a String
2996 Codeforces 710D: Two Arithmetic Progressions
2995 Codeforces 710C: Magic Odd Square
2994 Codeforces 710B: Optimal Point on a Line
2993 Codeforces 710A: King Moves
2992 Codeforces 709B: Checkpoints
2991 Codeforces 709A: Juicer
2990 Codeforces 708E: Student's Camp
2989 Codeforces 708D: Incorrect Flow
2988 Codeforces 708C: Centroids
2987 Codeforces 708B: Recover the String
2986 Codeforces 708A: Letters Cyclic Shift
2985 Codeforces 707E: Garlands
2984 Codeforces 707D: Persistent Bookcase
2983 Codeforces 707C: Pythagorean Triples
2982 Codeforces 707B: Bakery
2981 Codeforces 707A: Brain's Photos
2980 Codeforces 706E: Working routine
2979 Codeforces 706D: Vasiliy's Multiset
2978 Codeforces 706C: Hard problem
2977 Codeforces 706B: Interesting drink
2976 Codeforces 706A: Beru-taxi
2975 Codeforces 705B: Spider Man
2974 Codeforces 705A: Hulk
2973 Codeforces 704E: Iron Man
2972 Codeforces 704D: Captain America
2971 Codeforces 704C: Black Widow
2970 Codeforces 704B: Ant Man
2969 Codeforces 704A: Thor
2968 Codeforces 703E: Mishka and Divisors
2967 Codeforces 703D: Mishka and Interesting sum
2966 Codeforces 703C: Chris and Road
2965 Codeforces 703B: Mishka and trip
2964 Codeforces 703A: Mishka and Game
2963 Codeforces 702F: T-Shirts
2962 Codeforces 702E: Analysis of Pathes in Functional Graph
2961 Codeforces 702D: Road to Post Office
2960 Codeforces 702C: Cellular Network
2959 Codeforces 702B: Powers of Two
2958 Codeforces 702A: Maximum Increase
2957 Codeforces 701C: They Are Everywhere
2956 Codeforces 701B: Cells Not Under Attack
2955 Codeforces 701A: Cards
2954 Codeforces 700E: Cool Slogans
2953 Codeforces 700D: Huffman Coding on Segment
2952 Codeforces 700C: Break Up
2951 Codeforces 700B: Connecting Universities
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