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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)
16855 DMOJ DMOPC '15 Contest 1 P3 - Itami and Cipher
16854 DMOJ DMOPC '15 Contest 1 P2 - Itami and Squad
16853 DMOJ DMOPC '15 Contest 1 P1 - Itami and Manga
16852 DMOJ DMOPC '14 Exam Time P6 - Math Homework
16851 DMOJ DMOPC '14 Exam Time P5 - Happy Teachers
16850 DMOJ DMOPC '14 Exam Time P4 - Exam Delay
16849 DMOJ DMOPC '14 Exam Time P3 - Chemistry Homework
16848 DMOJ DMOPC '14 Exam Time P2 - Physics Duel
16847 DMOJ DMOPC '14 Exam Time P1 - French Homework
16846 DMOJ DMOPC '14 Contest 7 P6 - Revenge of the Bins
16845 DMOJ DMOPC '14 Contest 7 P5 - Aurora
16844 DMOJ DMOPC '14 Contest 7 P4 - Sand Triangle
16843 DMOJ DMOPC '14 Contest 7 P3 - Globally Unique Shells
16842 DMOJ DMOPC '14 Contest 7 P2 - Tides
16841 DMOJ DMOPC '14 Contest 7 P1 - Flare
16840 DMOJ DMOPC '14 Contest 6 P6 - Trip
16839 DMOJ DMOPC '14 Contest 6 P5 - Planning
16838 DMOJ DMOPC '14 Contest 6 P4 - Bus Jam
16837 DMOJ DMOPC '14 Contest 6 P3 - Streetcars
16836 DMOJ DMOPC '14 Contest 6 P2 - GO Faster
16835 DMOJ DMOPC '14 Contest 6 P1 - Finding Bessarion
16834 DMOJ DMOPC '14 Contest 5 P6 - Nia and Dominoes
16833 DMOJ DMOPC '14 Contest 5 P5 - Attack on Anti-Spiral
16832 DMOJ DMOPC '14 Contest 5 P4 - Kittan's Dilemma
16831 DMOJ DMOPC '14 Contest 5 P3 - Brotherly Sequence
16830 DMOJ DMOPC '14 Contest 5 P2 - Longest Tunnel
16829 DMOJ DMOPC '14 Contest 5 P1 - Core Drill
16828 DMOJ DMOPC '14 Contest 4 P6 - Save Nagato!
16827 DMOJ DMOPC '14 Contest 4 P5 - Aircraft Carrier Akagi
16826 DMOJ DMOPC '14 Contest 4 P4 - Sketchley Park
16825 DMOJ DMOPC '14 Contest 4 P3 - Golden Lily
16824 DMOJ DMOPC '14 Contest 4 P2 - Redirection
16823 DMOJ DMOPC '14 Contest 4 P1 - New Key
16822 DMOJ DMOPC '14 Contest 3 P6 - Not Enough Time!
16821 DMOJ DMOPC '14 Contest 3 P5 - Not Enough Servers!
16820 DMOJ DMOPC '14 Contest 3 P4 - Not Enough Testers!
16819 DMOJ DMOPC '14 Contest 3 P3 - Not Enough Personnel!
16818 DMOJ DMOPC '14 Contest 3 P2 - Not Enough Rejudging!
16817 DMOJ DMOPC '14 Contest 3 P1 - Not Enough Users!
16816 DMOJ DMOPC '14 Contest 2 P6 - Selective Cutting
16815 DMOJ DMOPC '14 Contest 2 P5 - Sawmill Scheme
16814 DMOJ DMOPC '14 Contest 2 P4 - Deforestation
16813 DMOJ DMOPC '14 Contest 2 P3 - Sawmill
16812 DMOJ DMOPC '14 Contest 2 P2 - Cutting Logs
16811 DMOJ DMOPC '14 Contest 2 P1 - Logging Log
16810 DMOJ DMOPC '14 Contest 1 P6 - Biology Homework
16809 DMOJ DMOPC '14 Contest 1 P5 - Surprise Teleport
16808 DMOJ DMOPC '14 Contest 1 P4 - Perfect Timing
16807 DMOJ DMOPC '14 Contest 1 P3 - New Students
16806 DMOJ DMOPC '14 Contest 1 P2 - Tiles
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