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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)
4950 Codeforces 1140D: Minimum Triangulation
4949 Codeforces 1140C: Playlist
4948 Codeforces 1140B: Good String
4947 Codeforces 1140A: Detective Book
4946 Codeforces 1139F: Dish Shopping
4945 Codeforces 1139E: Maximize Mex
4944 Codeforces 1139D: Steps to One
4943 Codeforces 1139C: Edgy Trees
4942 Codeforces 1139B: Chocolates
4941 Codeforces 1139A: Even Substrings
4940 Codeforces 1138B: Circus
4939 Codeforces 1138A: Sushi for Two
4938 Codeforces 1137F: Matches Are Not a Child's Play
4937 Codeforces 1137E: Train Car Selection
4936 Codeforces 1137D: Cooperative Game
4935 Codeforces 1137C: Museums Tour
4934 Codeforces 1137B: Camp Schedule
4933 Codeforces 1137A: Skyscrapers
4932 Codeforces 1136E: Nastya Hasn't Written a Legend
4931 Codeforces 1136D: Nastya Is Buying Lunch
4930 Codeforces 1136C: Nastya Is Transposing Matrices
4929 Codeforces 1136B: Nastya Is Playing Computer Games
4928 Codeforces 1136A: Nastya Is Reading a Book
4927 Codeforces 1133F2: Spanning Tree with One Fixed Degree
4926 Codeforces 1133F1: Spanning Tree with Maximum Degree
4925 Codeforces 1133E: K Balanced Teams
4924 Codeforces 1133D: Zero Quantity Maximization
4923 Codeforces 1133C: Balanced Team
4922 Codeforces 1133B: Preparation for International Women's Day
4921 Codeforces 1133A: Middle of the Contest
4920 Codeforces 1132G: Greedy Subsequences
4919 Codeforces 1132F: Clear the String
4918 Codeforces 1132E: Knapsack
4917 Codeforces 1132D: Stressful Training
4916 Codeforces 1132C: Painting the Fence
4915 Codeforces 1132B: Discounts
4914 Codeforces 1132A: Regular Bracket Sequence
4913 Codeforces 1131G: Most Dangerous Shark
4912 Codeforces 1131F: Asya And Kittens
4911 Codeforces 1131E: String Multiplication
4910 Codeforces 1131D: Gourmet choice
4909 Codeforces 1131C: Birthday
4908 Codeforces 1131B: Draw!
4907 Codeforces 1131A: Sea Battle
4906 Codeforces 1130C: Connect
4905 Codeforces 1130B: Two Cakes
4904 Codeforces 1130A: Be Positive
4903 Codeforces 1129E: Legendary Tree
4902 Codeforces 1129D: Isolation
4901 Codeforces 1129C: Morse Code
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