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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)
19805 DMOJ New Year's '17 P2 - Peter's Escape
19804 DMOJ New Year's '17 P1 - Mr. N and Presents
19803 DMOJ New Year's '16 P8 - S-NO-wall
19802 DMOJ New Year's '16 P7 - Old Christmas Lights
19801 DMOJ New Year's '16 P6 - Cake Balancing
19800 DMOJ New Year's '16 P5 - Eggnog Dilemma
19799 DMOJ New Year's '16 P4 - DIY Christmas Tree
19798 DMOJ New Year's '16 P3 - Arithmetic Snowman
19797 DMOJ New Year's '16 P2 - The 365 Days of Christmas
19796 DMOJ New Year's '16 P1 - Late Christmas Shopping
19795 DMOJ New Year's '15 P6 - Tiles
19794 DMOJ New Year's '15 P5 - Message to Mars
19793 DMOJ New Year's '15 P4 - Leftover Eggnog
19792 DMOJ New Year's '15 P3 - Gift Wrap
19791 DMOJ New Year's '15 P2 - Food Selection
19790 DMOJ New Year's '15 P1 - Invitation Devastation
19789 DMOJ Yet Another Contest 6 P6 - No More Snakes and Ladders
19788 DMOJ Yet Another Contest 6 P5 - No More Coyotes
19787 DMOJ Yet Another Contest 6 P4 - No More Nails!
19786 DMOJ Yet Another Contest 6 P3 - No More Cell Phone Messaging
19785 DMOJ Yet Another Contest 6 P2 - No More Telemarketers
19784 DMOJ Yet Another Contest 6 P1 - No More Separation
19783 DMOJ Yet Another Contest 5 P5 - No More Concerts
19782 DMOJ Yet Another Contest 5 P4 - Nils++
19781 DMOJ Yet Another Contest 5 P3 - Potted Plants
19780 DMOJ Yet Another Contest 5 P2 - Big Score
19779 DMOJ Yet Another Contest 5 P1 - Number Pyramid
19778 DMOJ Yet Another Contest 4 P6 - No More Solitaire
19777 DMOJ Yet Another Contest 4 P5 - Signpost
19776 DMOJ Yet Another Contest 4 P4 - Even The Odds
19775 DMOJ Yet Another Contest 4 P3 - Canadian Cactus Competition
19774 DMOJ Yet Another Contest 4 P2 - Alchemy 2
19773 DMOJ Yet Another Contest 4 P1 - Snap
19772 DMOJ Yet Another Contest 3 P5 - No More Thieves
19771 DMOJ Yet Another Contest 3 P4 - Rumour
19770 DMOJ Yet Another Contest 3 P3 - Topology
19769 DMOJ Yet Another Contest 3 P2 - Work Experience
19768 DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
19767 DMOJ Yet Another Contest 2 P6 - Travel Budget
19766 DMOJ Yet Another Contest 2 P5 - Mirror Maze
19765 DMOJ Yet Another Contest 2 P4 - No More Arithmetic
19764 DMOJ Yet Another Contest 2 P3 - Maximum Damage
19763 DMOJ Yet Another Contest 2 P2 - Secret Sequence
19762 DMOJ Yet Another Contest 2 P1 - Betting
19761 DMOJ Yet Another Contest 1 P6 - Alchemy
19760 DMOJ Yet Another Contest 1 P5 - Hopping Kangaroos
19759 DMOJ Yet Another Contest 1 P4 - No More Searching
19758 DMOJ Yet Another Contest 1 P3 - Fluke
19757 DMOJ Yet Another Contest 1 P2 - A Boring Problem
19756 DMOJ Yet Another Contest 1 P1 - Mixed Doubles
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