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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)
950 Codeforces 201E: Thoroughly Bureaucratic Organization
949 Codeforces 201D: Brand New Problem
948 Codeforces 201C: Fragile Bridges
947 Codeforces 201B: Guess That Car!
946 Codeforces 201A: Clear Symmetry
945 Codeforces 200E: Tractor College
944 Codeforces 200D: Programming Language
943 Codeforces 200C: Football Championship
942 Codeforces 200B: Drinks
941 Codeforces 200A: Cinema
940 Codeforces 199B: Special Olympics
939 Codeforces 199A: Hexadecimal's theorem
938 Codeforces 198E: Gripping Story
937 Codeforces 198D: Cube Snake
936 Codeforces 198C: Delivering Carcinogen
935 Codeforces 198B: Jumping on Walls
934 Codeforces 198A: About Bacteria
933 Codeforces 197B: Limit
932 Codeforces 197A: Plate Game
931 Codeforces 196E: Opening Portals
930 Codeforces 196D: The Next Good String
929 Codeforces 196C: Paint Tree
928 Codeforces 196B: Infinite Maze
927 Codeforces 196A: Lexicographically Maximum Subsequence
926 Codeforces 195E: Building Forest
925 Codeforces 195D: Analyzing Polyline
924 Codeforces 195C: Try and Catch
923 Codeforces 195B: After Training
922 Codeforces 195A: Let's Watch Football
921 Codeforces 194B: Square
920 Codeforces 194A: Exams
919 Codeforces 193E: Fibonacci Number
918 Codeforces 193D: Two Segments
917 Codeforces 193C: Hamming Distance
916 Codeforces 193B: Xor
915 Codeforces 193A: Cutting Figure
914 Codeforces 192B: Walking in the Rain
913 Codeforces 192A: Funky Numbers
912 Codeforces 191E: Thwarting Demonstrations
911 Codeforces 191D: Metro Scheme
910 Codeforces 191C: Fools and Roads
909 Codeforces 191B: Demonstration
908 Codeforces 191A: Dynasty Puzzles
907 Codeforces 190E: Counter Attack
906 Codeforces 190D: Non-Secret Cypher
905 Codeforces 190C: STL
904 Codeforces 190B: Surrounded
903 Codeforces 190A: Vasya and the Bus
902 Codeforces 189B: Counting Rhombi
901 Codeforces 189A: Cut Ribbon
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