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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)
15155 DMOJ ACM U of T Tryouts C3 C - A Subtle Surf
15154 DMOJ ACM U of T Tryouts C3 B - A Careful Reply
15153 DMOJ ACM U of T Tryouts C3 A - A Research Project
15152 DMOJ ACM U of T Tryouts C2 F - Light Cyclin'
15151 DMOJ ACM U of T Tryouts C2 E - MVP
15150 DMOJ ACM U of T Tryouts C2 D - Diablo Bot
15149 DMOJ ACM U of T Tryouts C2 C - Homemade Asteroids
15148 DMOJ ACM U of T Tryouts C2 A - The Super Mario Blues
15147 DMOJ ACM U of T Tryouts C1 F - Foxic Expressions
15146 DMOJ ACM U of T Tryouts C1 E - Foxling Feeding Frenzy
15145 DMOJ ACM U of T Tryouts C1 D - Reverse Fox Hunt
15144 DMOJ ACM U of T Tryouts C1 C - Foxhole
15143 DMOJ ACM U of T Tryouts C1 B - The Foxen's Treasure
15142 DMOJ ACM U of T Tryouts C1 A - Rock Paper Scissors Fox
15141 DMOJ ACM U of T Tryouts C0 B - Interleaving Leaves
15140 DMOJ ACM U of T Tryouts C0 A - Max Flow
15139 DMOJ Another Contest 9 Problem 5 - Satellite
15138 DMOJ Another Contest 9 Problem 4 - Alchemy
15137 DMOJ Another Contest 9 Problem 3 - Sun & Moon
15136 DMOJ Another Contest 9 Problem 2 - Counting Down the Days
15135 DMOJ Another Contest 9 Problem 1 - Black Room Boy
15134 DMOJ Another Contest 8 Problem 6 - Unnecessary Forced Reverse Trash Finesse
15133 DMOJ Another Contest 8 Problem 5 - U-Turn Finesse
15132 DMOJ Another Contest 8 Problem 4 - Up and Down
15131 DMOJ Another Contest 8 Problem 3 - Replay Double Ignition
15130 DMOJ Another Contest 8 Problem 2 - Unnecessary Trash Push
15129 DMOJ Another Contest 8 Problem 1 - Trash Push
15128 DMOJ Another Contest 7 Problem 4 - Team Assignments
15127 DMOJ Another Contest 7 Problem 3 - Network Connections
15126 DMOJ Another Contest 7 Problem 2 - Code Review
15125 DMOJ Another Contest 7 Problem 1 - Lonely Users
15124 DMOJ Another Contest 6 Problem 9 - Obligatory Wood IV Problem
15123 DMOJ Another Contest 6 Problem 8 - #define int long long
15122 DMOJ Another Contest 6 Problem 7 - Consonant or Vowel?
15121 DMOJ Another Contest 6 Problem 6 - Name That Song
15120 DMOJ 다른 콘테스트 6 문제 5 - Fan Death
15119 DMOJ Another Contest 6 Problem 4 - A Plus B (Hard)
15118 DMOJ Another Contest 6 Problem 3 - A Plus B (Medium)
15117 DMOJ Another Contest 6 Problem 2 - A Plus B (Easy)
15116 DMOJ Another Contest 6 Problem 17 - Boolean (Lunatic)
15115 DMOJ Another Contest 6 Problem 16 - Boolean (Hard)
15114 DMOJ Another Contest 6 Problem 15 - Boolean (Medium)
15113 DMOJ Another Contest 6 Problem 14 - Boolean (Easy)
15112 DMOJ Another Contest 6 Problem 13 - Boolean (Warmup)
15111 DMOJ Another Contest 6 Problem 12 - A Pretty Standard Problem Involving Judge Kirito
15110 DMOJ Another Contest 6 Problem 11 - Infinite Corridor Simulator
15109 DMOJ Another Contest 6 Problem 10 - Putting the Pieces Together
15108 DMOJ Another Contest 6 Problem 1 - A Plus B (Warmup)
15107 DMOJ Another Contest 6 Problem 0 - Another Warmup Problem
15106 DMOJ Another Contest 5 Problem 5 - Another Cheese Problem
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