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)
18583 DMOJ Mock CCO '18 Contest 4 Problem 3 - Counterattack
18582 DMOJ Mock CCO '18 Contest 4 Problem 2 - Sunken Colonies
18581 DMOJ Mock CCO '18 Contest 4 Problem 1 - Mining for Minerals
18580 DMOJ Mock CCO '18 Contest 3 Problem 6 - Roger Asks For More Marks
18579 DMOJ Mock CCO '18 Contest 3 Problem 5 - Roger Outsources DMOJ Work
18578 DMOJ Mock CCO '18 Contest 3 Problem 4 - Roger Solves A Classic Rage Tree Problem
18577 DMOJ Mock CCO '18 Contest 3 Problem 3 - Roger Just Plays Some More Chess
18576 DMOJ Mock CCO '18 Contest 3 Problem 2 - Roger Delegates Work to Jessica
18575 DMOJ Mock CCO '18 Contest 3 Problem 1 - Roger Meets For DMPG
18574 DMOJ Mock CCO '18 Contest 2 Problem 6 - Victor's Cubes
18573 DMOJ Mock CCO '18 Contest 2 Problem 5 - Victor's Triangles
18572 DMOJ Mock CCO '18 Contest 2 Problem 4 - Victor's Rectangles
18571 DMOJ Mock CCO '18 Contest 2 Problem 3 - Victor Trains
18570 DMOJ Mock CCO '18 Contest 2 Problem 2 - Victor Rains
18569 DMOJ Mock CCO '18 Contest 2 Problem 1 - Victor Runs
18568 DMOJ Mock CCO '18 Contest 1 Problem 6 - A Combining Problem
18567 DMOJ Mock CCO '18 Contest 1 Problem 5 - A Counting Problem
18566 DMOJ Mock CCO '18 Contest 1 Problem 4 - A Rectangle Problem
18565 DMOJ Mock CCC '22 1 S5 - Berkeley Math Tournament Awards Ceremony
18564 DMOJ Mock CCC '22 1 S4 - Berkeley Math Tournament Statistics
18563 DMOJ Mock CCC '22 1 S3 - IU
18562 DMOJ Mock CCC '22 1 S2 - IU
18561 DMOJ Mock CCC '22 1 S1 - Big Mattress Tournament
18560 DMOJ Mock CCC '21 S5 - Clique and Independent Set
18559 DMOJ Mock CCC '21 S4 - Infinite Molecule
18558 DMOJ Mock CCC '21 S3 - Lexicographically Smallest Permutation Subsequence
18557 DMOJ Mock CCC '21 S2 - Colorful Strings
18556 DMOJ Mock CCC '21 S1 - Edit Distance
18555 DMOJ Mock CCC '19 Contest 2 S5 - Tudor Takes Pictures of Goats
18554 DMOJ Mock CCC '19 Contest 2 S4 - Tudor Walks Among the Goats
18553 DMOJ Mock CCC '19 Contest 2 S3 - Tudor Tallies Triangular Totals
18552 DMOJ Mock CCC '19 Contest 2 S2 - Tudor Puts A Goat On A Rope
18551 DMOJ Mock CCC '19 Contest 2 S1 - Tudor's Double Doors
18550 DMOJ Mock CCC '19 Contest 2 J5 - Tudor Drinks Even More Tea
18549 DMOJ Mock CCC '19 Contest 2 J4 - Tudor Buys Some Cheesecake
18548 DMOJ Mock CCC '19 Contest 2 J3 - Tudor Buys Some Tea
18547 DMOJ Mock CCC '19 Contest 2 J2 - Tudor Drinks Some More Tea
18546 DMOJ Mock CCC '19 Contest 2 J1 - Tudor Drinks Some Tea
18545 DMOJ Mock CCC '19 Contest 1 S5 - Pusheen Eats Even More Tuna Sashimi and Tuna Nigiri
18544 DMOJ Mock CCC '19 Contest 1 S4 - Pusheen Plays Neko Atsume
18543 DMOJ Mock CCC '19 Contest 1 S3 - Pusheen Eats Tuna Sashimi and Tuna Nigiri
18542 DMOJ Mock CCC '19 Contest 1 S2 - Pusheen's Puzzle Present
18541 DMOJ Mock CCC '19 Contest 1 S1 - Pusheen's Report Card
18540 DMOJ Mock CCC '19 Contest 1 J5 - Pusheen Designs a Sushi Boat
18539 DMOJ Mock CCC '19 Contest 1 J4 - Pusheen Plays Neko Atsume
18538 DMOJ Mock CCC '19 Contest 1 J3 - Pusheen Eats Tuna Sashimi and Tuna Nigiri
18537 DMOJ Mock CCC '19 Contest 1 J2 - Pusheen OCR
18536 DMOJ Mock CCC '19 Contest 1 J1 - Pusheen's Report Card
18535 DMOJ Mock CCC '18 Contest 5 S5 - California Boggle
18534 DMOJ Mock CCC '18 Contest 5 S4 - Sparse Binary String Counting
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