Starlight

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.

Reset

Need help searching? Click for format/examples of problems
  • 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)
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
15105 DMOJ Another Contest 5 Problem 4 - Tudor Interacts With Poop
15104 DMOJ Another Contest 5 Problem 3 - Cutting Cheese Costs
15103 DMOJ Another Contest 5 Problem 2 - Great Graffiti
15102 DMOJ Another Contest 5 Problem 1 - Goat Fence
15101 DMOJ Another Contest 4 Problem 9 - Fast Fourier Transform!
15100 DMOJ Another Contest 4 Problem 8 - DMOJ!
15099 DMOJ Another Contest 4 Problem 7 - A Sack of Creatures
15098 DMOJ Another Contest 4 Problem 6 - One Billion Views
15097 DMOJ Another Contest 4 Problem 5 - Prime Time Television
15096 DMOJ Another Contest 4 Problem 4 - Another Isosceles Right Triangle
15095 DMOJ Another Contest 4 Problem 3 - An Isosceles Right Triangle
15094 DMOJ Another Contest 4 Problem 2 - The Deutsch-Jozsa Algorithm
15093 DMOJ Another Contest 4 Problem 11 - Three Rectangles
15092 DMOJ Another Contest 4 Problem 10 - Two Rectangles
15091 DMOJ Another Contest 4 Problem 1 - Identity Crisis
15090 DMOJ Another Contest 4 Problem 0 - The April Fools Warmup Problem
15089 DMOJ Another Contest 3 Problem 4 - Range Updates and Range Queries
15088 DMOJ Another Contest 3 Problem 3 - Lexicographically Largest Common Subsequence
15087 DMOJ Another Contest 3 Problem 2 - Camelot
15086 DMOJ Another Contest 3 Problem 1 - Diverse Arrays
15085 DMOJ Another Contest 2 Problem 3 - Poutine
15084 DMOJ Another Contest 2 Problem 2 - Poutine
View links to all pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101

About • Privacy Notice • Rules • Problems list • Journal • Your profile • GitHub

Moon Symbol icon by Icons8 • Sun icon by Icons8 • Emojis from Twemoji by Twitter under CC by 4.0