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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)
4250 Codeforces 995B: Suit and Tie
4249 Codeforces 995A: Tesla
4248 Codeforces 994B: Knights of a Polygonal Table
4247 Codeforces 994A: Fingerprints
4246 Codeforces 993F: The Moral Dilemma
4245 Codeforces 993E: Nikita and Order Statistics
4244 Codeforces 993D: Compute Power
4243 Codeforces 993C: Careful Maneuvering
4242 Codeforces 993B: Open Communication
4241 Codeforces 993A: Two Squares
4240 Codeforces 992E: Nastya and King-Shamans
4239 Codeforces 992D: Nastya and a Game
4238 Codeforces 992C: Nastya and a Wardrobe
4237 Codeforces 992B: Nastya Studies Informatics
4236 Codeforces 992A: Nastya and an Array
4235 Codeforces 991F: Concise and clear
4234 Codeforces 991E: Bus Number
4233 Codeforces 991D: Bishwock
4232 Codeforces 991C: Candies
4231 Codeforces 991B: Getting an A
4230 Codeforces 991A: If at first you don't succeed...
4229 Codeforces 990G: GCD Counting
4228 Codeforces 990F: Flow Control
4227 Codeforces 990E: Post Lamps
4226 Codeforces 990D: Graph And Its Complement
4225 Codeforces 990C: Bracket Sequences Concatenation Problem
4224 Codeforces 990B: Micro-World
4223 Codeforces 990A: Commentary Boxes
4222 Codeforces 989E: A Trance of Nightfall
4221 Codeforces 989D: A Shade of Moonlight
4220 Codeforces 989C: A Mist of Florescence
4219 Codeforces 989B: A Tide of Riverscape
4218 Codeforces 989A: A Blend of Springtime
4217 Codeforces 988F: Rain and Umbrellas
4216 Codeforces 988E: Divisibility by 25
4215 Codeforces 988D: Points and Powers of Two
4214 Codeforces 988C: Equal Sums
4213 Codeforces 988B: Substrings Sort
4212 Codeforces 988A: Diverse Team
4211 Codeforces 987C: Three displays
4210 Codeforces 987B: High School: Become Human
4209 Codeforces 987A: Infinity Gauntlet
4208 Codeforces 986F: Oppa Funcan Style Remastered
4207 Codeforces 986E: Prince's Problem
4206 Codeforces 986D: Perfect Encoding
4205 Codeforces 986C: AND Graph
4204 Codeforces 986B: Petr and Permutations
4203 Codeforces 986A: Fair
4202 Codeforces 985G: Team Players
4201 Codeforces 985F: Isomorphic Strings
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