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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)
18355 DMOJ Mock CCC '23 Contest 1 J5 - Calculus Problem
18354 DMOJ Mock CCC '23 Contest 1 J4 - String Decryption
18353 DMOJ Mock CCC '23 Contest 1 J3 - Pairing Gifts
18352 DMOJ Mock CCC '23 Contest 1 J2 - Healthy Schedule
18351 DMOJ Mock CCC '23 Contest 1 J1 - Final Velocity
18350 DMOJ Mock CCC '22 Contest 2 J5 - Dominating the Olympics
18349 DMOJ Mock CCC '22 Contest 2 J4 - Hockey Bracket
18348 DMOJ Mock CCC '22 Contest 2 J3 - Figure Skating Fun
18347 DMOJ Mock CCC '22 Contest 2 J2 - Snowboarding Championship
18346 DMOJ Mock CCC '22 Contest 2 J1 - Opening Ceremony
18345 DMOJ Mock CCC '22 Contest 1 J5 - New Year's Restrictions
18344 DMOJ Mock CCC '22 Contest 1 J4 - Snowball Fight
18343 DMOJ Mock CCC '22 Contest 1 J3 - String Crossing Maximization
18342 DMOJ Mock CCC '22 Contest 1 J2 - Biking and Hiking
18341 DMOJ Mock CCC '22 Contest 1 J1 - Square Root Decomposition
18340 DMOJ Mock CCC '20 Contest 2 S5 - Sticks
18339 DMOJ Mock CCC '20 Contest 2 S4 - Rotational Arrays
18338 DMOJ Mock CCC '20 Contest 2 S3 - Tree Programming
18337 DMOJ Mock CCC '20 Contest 2 S2 - 4D BBST on a DP
18336 DMOJ Mock CCC '20 Contest 2 S1 - Arithmetic Hybercube
18335 DMOJ Mock CCC '20 S4 - Valentine's Day Shopping
18334 DMOJ Mock CCC '20 S3 - SAM I Am
18333 DMOJ Mock CCC '20 S2 - Flipper Redux
18332 DMOJ Mock CCC '20 S1 - War
18331 DMOJ Mock CCC '20 Contest 1 J5 - A Prime Problem
18330 DMOJ Mock CCC '20 Contest 1 J4 - A Binary Problem
18329 DMOJ Mock CCC '20 Contest 1 J3 - A Geometry Problem
18328 DMOJ Mock CCC '20 Contest 1 J2 - A Simplex Problem
18327 DMOJ Mock CCC '20 Contest 1 J1 - A Rage Tree Problem
18326 DMOJ Maximum Product of K Integers
18325 DMOJ Fast Matrix Multiplication
18324 DMOJ Mathtermind
18323 DMOJ A Math Contest P9 - Buy Some Get Some
18322 DMOJ A Math Contest P8 - Permutation Counting
18321 DMOJ A Math Contest P7 - Factors
18320 DMOJ A Math Contest P6 - Global Maximum
18319 DMOJ A Math Contest P5 - Good Arrays
18318 DMOJ A Math Contest P4 - Circle Cutting
18317 DMOJ A Math Contest P3 - LIS Reconstruction
18316 DMOJ A Math Contest P2 - Subsequence Sum
18315 DMOJ A Math Contest P17 - Heatwaves
18314 DMOJ A Math Contest P16 - Morbius vs. Suibom
18313 DMOJ A Math Contest P15 - Matrix Fixed Point
18312 DMOJ A Math Contest P14 - Choosing Marbles
18311 DMOJ A Math Contest P13 - Ways
18310 DMOJ A Math Contest P12 - Triangles
18309 DMOJ A Math Contest P11 - Weak Goldbach's Conjecture
18308 DMOJ A Math Contest P10 - Tricky Multisets
18307 DMOJ A Math Contest P1 - Arrays
18306 DMOJ MALD Contest 1 P6 - Scratch Cat and Painting
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