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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)
1000 Codeforces 213D: Stars
999 Codeforces 213C: Relay Race
998 Codeforces 213B: Numbers
997 Codeforces 213A: Game
996 Codeforces 212E: IT Restaurants
995 Codeforces 212D: Cutting a Fence
994 Codeforces 212C: Cowboys
993 Codeforces 212B: Polycarpus is Looking for Good Substrings
992 Codeforces 212A: Privatization
991 Codeforces 209C: Trails and Glades
990 Codeforces 209B: Pixels
989 Codeforces 209A: Multicolored Marbles
988 Codeforces 208E: Blood Cousins
987 Codeforces 208D: Prizes, Prizes, more Prizes
986 Codeforces 208C: Police Station
985 Codeforces 208B: Solitaire
984 Codeforces 208A: Dubstep
983 Codeforces 207D9: The Beaver's Problem - 3
982 Codeforces 207D8: The Beaver's Problem - 3
981 Codeforces 207D7: The Beaver's Problem - 3
980 Codeforces 207D6: The Beaver's Problem - 3
979 Codeforces 207D5: The Beaver's Problem - 3
978 Codeforces 207D4: The Beaver's Problem - 3
977 Codeforces 207D3: The Beaver's Problem - 3
976 Codeforces 207D2: The Beaver's Problem - 3
975 Codeforces 207D10: The Beaver's Problem - 3
974 Codeforces 207D1: The Beaver's Problem - 3
973 Codeforces 207C3: Game with Two Trees
972 Codeforces 207C2: Game with Two Trees
971 Codeforces 207C1: Game with Two Trees
970 Codeforces 207B3: Military Trainings
969 Codeforces 207B2: Military Trainings
968 Codeforces 207B1: Military Trainings
967 Codeforces 207A3: Beaver's Calculator 1.0
966 Codeforces 207A2: Beaver's Calculator 1.0
965 Codeforces 207A1: Beaver's Calculator 1.0
964 Codeforces 205B: Little Elephant and Sorting
963 Codeforces 205A: Little Elephant and Rozdil
962 Codeforces 204E: Little Elephant and Strings
961 Codeforces 204D: Little Elephant and Retro Strings
960 Codeforces 204C: Little Elephant and Furik and Rubik
959 Codeforces 204B: Little Elephant and Cards
958 Codeforces 204A: Little Elephant and Interval
957 Codeforces 203E: Transportation
956 Codeforces 203D: Hit Ball
955 Codeforces 203C: Photographer
954 Codeforces 203B: Game on Paper
953 Codeforces 203A: Two Problems
952 Codeforces 202B: Brand New Easy Problem
951 Codeforces 202A: LLPS
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