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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)
2950 Codeforces 700A: As Fast As Possible
2949 Codeforces 699B: One Bomb
2948 Codeforces 699A: Launch of Collider
2947 Codeforces 698F: Coprime Permutation
2946 Codeforces 698E: Cron
2945 Codeforces 698D: Limak and Shooting Points
2944 Codeforces 698C: LRU
2943 Codeforces 698B: Fix a Tree
2942 Codeforces 698A: Vacations
2941 Codeforces 697B: Barnicle
2940 Codeforces 697A: Pineapple Incident
2939 Codeforces 696F: ...Dary!
2938 Codeforces 696E: ...Wait for it...
2937 Codeforces 696D: Legen...
2936 Codeforces 696C: PLEASE
2935 Codeforces 696B: Puzzles
2934 Codeforces 696A: Lorenzo Von Matterhorn
2933 Codeforces 691F: Couple Cover
2932 Codeforces 691E: Xor-sequences
2931 Codeforces 691D: Swaps in Permutation
2930 Codeforces 691C: Exponential notation
2929 Codeforces 691B: s-palindrome
2928 Codeforces 691A: Fashion in Berland
2927 Codeforces 690F3: Tree of Life (hard)
2926 Codeforces 690F2: Tree of Life (medium)
2925 Codeforces 690F1: Tree of Life (easy)
2924 Codeforces 690E2: Photographs (II)
2923 Codeforces 690E1: Photographs (I)
2922 Codeforces 690D3: The Wall (hard)
2921 Codeforces 690D2: The Wall (medium)
2920 Codeforces 690D1: The Wall (easy)
2919 Codeforces 690C3: Brain Network (hard)
2918 Codeforces 690C2: Brain Network (medium)
2917 Codeforces 690C1: Brain Network (easy)
2916 Codeforces 690B3: Recover Polygon (hard)
2915 Codeforces 690B2: Recover Polygon (medium)
2914 Codeforces 690B1: Recover Polygon (easy)
2913 Codeforces 690A3: Collective Mindsets (hard)
2912 Codeforces 690A2: Collective Mindsets (medium)
2911 Codeforces 690A1: Collective Mindsets (easy)
2910 Codeforces 689E: Mike and Geometry Problem
2909 Codeforces 689D: Friends and Subsequences
2908 Codeforces 689C: Mike and Chocolate Thieves
2907 Codeforces 689B: Mike and Shortcuts
2906 Codeforces 689A: Mike and Cellphone
2905 Codeforces 688B: Lovely Palindromes
2904 Codeforces 688A: Opponents
2903 Codeforces 687E: TOF
2902 Codeforces 687D: Dividing Kingdom II
2901 Codeforces 687C: The Values You Can Make
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