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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)
14740 AtCoder TYPICAL90: 016. Minimum Coins（★3）
14739 AtCoder TYPICAL90: 015. Don't be too close（★6）
14738 AtCoder TYPICAL90: 014. We Used to Sing a Song Together（★3）
14737 AtCoder TYPICAL90: 013. Passing（★5）
14736 AtCoder TYPICAL90: 012. Red Painting（★4）
14735 AtCoder TYPICAL90: 011. Gravy Jobs（★6）
14734 AtCoder TYPICAL90: 010. Score Sum Queries（★2）
14733 AtCoder TYPICAL90: 009. Three Point Angle（★6）
14732 AtCoder TYPICAL90: 008. AtCounter（★4）
14731 AtCoder TYPICAL90: 007. CP Classes（★3）
14730 AtCoder TYPICAL90: 006. Smallest Subsequence（★5）
14729 AtCoder TYPICAL90: 005. Restricted Digits（★7）
14728 AtCoder TYPICAL90: 004. Cross Sum（★2）
14727 AtCoder TYPICAL90: 090. Tenkei90's Last Problem（★7）
14726 AtCoder TYPICAL90: 089. Partitions and Inversions（★7）
14725 AtCoder TYPICAL90: 088. Similar but Different Ways（★6）
14724 AtCoder TYPICAL90: 087. Chokudai's Demand（★5）
14723 AtCoder TYPICAL90: 086. Snuke's Favorite Arrays（★5）
14722 AtCoder TYPICAL90: 085. Multiplication 085（★4）
14721 AtCoder TYPICAL90: 084. There are two types of characters（★3）
14720 AtCoder TYPICAL90: 083. Colorful Graph（★6）
14719 AtCoder TYPICAL90: 082. Counting Numbers（★3）
14718 AtCoder TYPICAL90: 081. Friendly Group（★5）
14717 AtCoder TYPICAL90: 080. Let's Share Bit（★6）
14716 AtCoder TYPICAL90: 079. Two by Two（★3）
14715 AtCoder TYPICAL90: 003. Longest Circular Road（★4）
14714 AtCoder TYPICAL90: 078. Easy Graph Problem（★2）
14713 AtCoder TYPICAL90: 077. Planes on a 2D Plane（★7）
14712 AtCoder TYPICAL90: 076. Cake Cut（★3）
14711 AtCoder TYPICAL90: 075. Magic For Balls（★3）
14710 AtCoder TYPICAL90: 074. ABC String 2（★6）
14709 AtCoder TYPICAL90: 073. We Need Both a and b（★5）
14708 AtCoder TYPICAL90: 072. Loop Railway Plan（★4）
14707 AtCoder TYPICAL90: 071. Fuzzy Priority（★7）
14706 AtCoder TYPICAL90: 070. Plant Planning（★4）
14705 AtCoder TYPICAL90: 069. Colorful Blocks 2（★3）
14704 AtCoder TYPICAL90: 068. Paired Information（★5）
14703 AtCoder TYPICAL90: 067. Base 8 to 9（★2）
14702 AtCoder TYPICAL90: 066. Various Arrays（★5）
14701 AtCoder TYPICAL90: 065. RGB Balls 2（★7）
14700 AtCoder TYPICAL90: 064. Uplift（★3）
14699 AtCoder TYPICAL90: 063. Monochromatic Subgrid（★4）
14698 AtCoder TYPICAL90: 062. Paint All（★6）
14697 AtCoder TYPICAL90: 061. Deck（★2）
14696 AtCoder TYPICAL90: 060. Chimera（★5）
14695 AtCoder TYPICAL90: 059. Many Graph Queries（★7）
14694 AtCoder TYPICAL90: 058. Original Calculator（★4）
14693 AtCoder TYPICAL90: 057. Flip Flap（★6）
14692 AtCoder TYPICAL90: 056. Lucky Bag（★5）
14691 AtCoder TYPICAL90: 055. Select 5（★2）
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