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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)
3700 Codeforces 865G: Flowers and Chocolate
3699 Codeforces 865F: Egg Roulette
3698 Codeforces 865E: Hex Dyslexia
3697 Codeforces 865D: Buy Low Sell High
3696 Codeforces 865C: Gotta Go Fast
3695 Codeforces 865B: Ordering Pizza
3694 Codeforces 865A: Save the problem!
3693 Codeforces 864F: Cities Excursions
3692 Codeforces 864E: Fire
3691 Codeforces 864D: Make a Permutation!
3690 Codeforces 864C: Bus
3689 Codeforces 864B: Polycarp and Letters
3688 Codeforces 864A: Fair Game
3687 Codeforces 863G: Graphic Settings
3686 Codeforces 863F: Almost Permutation
3685 Codeforces 863E: Turn Off The TV
3684 Codeforces 863D: Yet Another Array Queries Problem
3683 Codeforces 863C: 1-2-3
3682 Codeforces 863B: Kayaking
3681 Codeforces 863A: Quasi-palindrome
3680 Codeforces 862F: Mahmoud and Ehab and the final stage
3679 Codeforces 862E: Mahmoud and Ehab and the function
3678 Codeforces 862D: Mahmoud and Ehab and the binary string
3677 Codeforces 862C: Mahmoud and Ehab and the xor
3676 Codeforces 862B: Mahmoud and Ehab and the bipartiteness
3675 Codeforces 862A: Mahmoud and Ehab and the MEX
3674 Codeforces 860E: Arkady and a Nobody-men
3673 Codeforces 859G: Circle of Numbers
3672 Codeforces 859F: Ordering T-Shirts
3671 Codeforces 859E: Desk Disorder
3670 Codeforces 859D: Third Month Insanity
3669 Codeforces 859C: Pie Rules
3668 Codeforces 859B: Lazy Security Guard
3667 Codeforces 859A: Declined Finalists
3666 Codeforces 858F: Wizard's Tour
3665 Codeforces 858E: Tests Renumeration
3664 Codeforces 858D: Polycarp's phone book
3663 Codeforces 858C: Did you mean...
3662 Codeforces 858B: Which floor?
3661 Codeforces 858A: k-rounding
3660 Codeforces 856F: To Play or not to Play
3659 Codeforces 856E: Satellites
3658 Codeforces 856D: Masha and Cactus
3657 Codeforces 856C: Eleventh Birthday
3656 Codeforces 856B: Similar Words
3655 Codeforces 856A: Set Theory
3654 Codeforces 855G: Harry Vs Voldemort
3653 Codeforces 855F: Nagini
3652 Codeforces 855E: Salazar Slytherin's Locket
3651 Codeforces 855D: Rowena Ravenclaw's Diadem
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