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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)
17905 DMOJ Good Sets
17904 DMOJ Good Celebration
17903 DMOJ Good Inflation
17902 DMOJ Good Aim
17901 DMOJ Good Debugging
17900 DMOJ Good Code
17899 DMOJ Good Strategy
17898 DMOJ Good Predictions
17897 DMOJ Good Travels
17896 DMOJ Greater New York Regional 2012 - Mystery
17895 DMOJ GlobeX Cup '19 S5 - Alien Navigation
17894 DMOJ GlobeX Cup '19 S4 - Ninjaclasher's Wrath 2
17893 DMOJ GlobeX Cup '19 S3 - Ninjaclasher's Wrath
17892 DMOJ GlobeX Cup '19 S2 - Predicting Collisions
17891 DMOJ GlobeX Cup '19 S1 - Planet Classification
17890 DMOJ GlobeX Cup '19 J5 - Aliens
17889 DMOJ GlobeX Cup '19 J4 - Winni's Lonely Card Game
17888 DMOJ GlobeX Cup '19 J3 - Codex
17887 DMOJ GlobeX Cup '19 J2 - Winnie Waifu Wars
17886 DMOJ GlobeX Cup '19 J1 - Chess Master Winnie
17885 DMOJ GlobeX Cup '18 S5 - Math Bash
17884 DMOJ GlobeX Cup '18 S4 - Reversed Dijkstra's
17883 DMOJ GlobeX Cup '18 S3 - Playing With Bits
17882 DMOJ GlobeX Cup '18 S2 - Test Scores
17881 DMOJ GlobeX Cup '18 S1 - Code Copiers
17880 DMOJ GlobeX Cup '18 S Sample - Chair Stacking
17879 DMOJ GlobeX Cup '18 J5 - Errands
17878 DMOJ GlobeX Cup '18 J4 - Magical Functions
17877 DMOJ GlobeX Cup '18 J3 - Good Numbers
17876 DMOJ GlobeX Cup '18 J2 - Mark Gambling
17875 DMOJ GlobeX Cup '18 J1 - Rounding Errors
17874 DMOJ GlobeX Cup '18 J Sample - Farming Simulator
17873 DMOJ Google Kickstart '17 Round F Problem A - Kicksort
17872 DMOJ Google Kickstart '17 Round C Problem C - Magical Thinking
17871 DMOJ Google Kickstart '17 Round C Problem B - X Squared
17870 DMOJ Google Kickstart '17 Round C Problem A - Ambiguous Cipher
17869 DMOJ Google Kickstart '17 Round A Problem A - Square Counting
17868 DMOJ PEG Test '14 - Gift Delivery
17867 DMOJ Guitar Hero
17866 DMOJ GFSSOC '15 Fall Practice P5 - Bruno and Pumpkins
17865 DMOJ GFSSOC '15 Fall Practice P4 - Bruno and Fibonacci
17864 DMOJ GFSSOC '15 Fall Practice P3 - Bruno and Beads
17863 DMOJ GFSSOC '15 Fall Practice P2 - Bruno and Tennis
17862 DMOJ GFSSOC '15 Fall Practice P1 - Bruno and Trig
17861 DMOJ GFSSOC '15 Winter S5 - ORBOT
17860 DMOJ GFSSOC '15 Winter S4 - Starry Nights
17859 DMOJ GFSSOC '15 Winter S3 - PalinDrone
17858 DMOJ GFSSOC '15 Winter S2 - Soko-Boop
17857 DMOJ GFSSOC '15 Winter S1 - OR-deal
17856 DMOJ GFSSOC '15 Winter J5 - Secret Santa
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