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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)
19255 DMOJ TLE '17 Contest 6 P3 - Spencer and Contest
19254 DMOJ TLE '17 Contest 6 P2 - Mr. More-than-perfect
19253 DMOJ TLE '17 Contest 6 P1 - Molecules
19252 DMOJ TLE '17 Contest 5 P6 - Circuits
19251 DMOJ TLE '17 Contest 5 P5 - Word Compression
19250 DMOJ TLE '17 Contest 5 P4 - Cloning
19249 DMOJ TLE '17 Contest 5 P3 - Willson and Factorization
19248 DMOJ TLE '17 Contest 5 P2 - Delivery Service II
19247 DMOJ TLE '17 Contest 5 P1 - Guess the Number
19246 DMOJ TLE '17 Contest 4 P6 - Fax's Christmas Bash
19245 DMOJ TLE '17 Contest 4 P5 - Pascal's Tree
19244 DMOJ TLE '17 Contest 4 P4 - Willson and Target Practice
19243 DMOJ TLE '17 Contest 4 P3 - Fax's Christmas Dish
19242 DMOJ TLE '17 Contest 4 P2 - Microwave Buttons
19241 DMOJ TLE '17 Contest 4 P1 - Riding the Curve
19240 DMOJ TLE '17 Contest 3 P6 - Donut Coupons
19239 DMOJ TLE '17 Contest 3 P5 - Hypercube Hotel
19238 DMOJ TLE '17 Contest 3 P4 - Meatballs
19237 DMOJ TLE '17 Contest 3 P3 - Fax's Thanksgiving Dish
19236 DMOJ TLE '17 Contest 3 P2 - Sectors
19235 DMOJ TLE '17 Contest 3 P1 - Willson and Territory
19234 DMOJ TLE '17 Contest 2 P6 - Save Jody!
19233 DMOJ TLE '17 Contest 2 P5 - Crew Selection Test
19232 DMOJ TLE '17 Contest 2 P4 - ECOO
19231 DMOJ TLE '17 Contest 2 P3 - Willson and Migration
19230 DMOJ TLE '17 Contest 2 P2 - Unlucky Numbers
19229 DMOJ TLE '17 Contest 2 P1 - Cadadr
19228 DMOJ TLE '17 Contest 1 P6 - Investment
19227 DMOJ TLE '17 Contest 1 P5 - Cake
19226 DMOJ TLE '17 Contest 1 P4 - Tempest
19225 DMOJ TLE '17 Contest 1 P3 - Screensaver 2
19224 DMOJ TLE '17 Contest 1 P2 - Willson and Food
19223 DMOJ TLE '17 Contest 1 P1 - String Rounding
19222 DMOJ TLE '16 Contest 8 P6 - Traffic Lights
19221 DMOJ TLE '16 Contest 8 P5 - Prom Night
19220 DMOJ TLE '16 Contest 8 P4 - Delivery Service
19219 DMOJ TLE '16 Contest 8 P3 - Fool's Sequence
19218 DMOJ TLE '16 Contest 8 P2 - Dank Meme
19217 DMOJ TLE '16 Contest 8 P1 - Paper Hole Punching
19216 DMOJ TLE '16 Contest 7 P6 - Everyone Hates Reading
19215 DMOJ TLE '16 Contest 7 P5 - Shortest Path Faster Algorithm
19214 DMOJ TLE '16 Contest 7 P4 - Abstract Problem
19213 DMOJ TLE '16 Contest 7 P3 - NOR
19212 DMOJ TLE '16 Contest 7 P2 - Judging
19211 DMOJ TLE '16 Contest 7 P1 - Math Helper
19210 DMOJ TLE '16 Contest 6 (Mock CCC) S5 - Toll Routes
19209 DMOJ TLE '16 Contest 6 (Mock CCC) S4 - Bubble Sort
19208 DMOJ TLE '16 Contest 6 (Mock CCC) S3 - Hyper Fax
19207 DMOJ TLE '16 Contest 6 (Mock CCC) S2 - Paper Stapling
19206 DMOJ TLE '16 Contest 6 (Mock CCC) S1 - Writing the CCC
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