Starlight: List of Problems

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Over 20,000 problems available. AMC 8/10/12 and AIME problems from 2010-2023; USAJMO/USAMO problems from 2002-2023 available. USACO problems from 2014 to 2023 (all divisions). Codeforces, AtCoder, DMOJ problems are added daily around 04:00 AM UTC, which may cause disruptions.

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ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
5071 Codeforces 1163A: Eating Soup
5070 Codeforces 1162B: Double Matrix
5069 Codeforces 1162A: Zoning Restrictions Again
5068 Codeforces 1160A2: Collaboration
5067 Codeforces 1159B: Expansion coefficient of the array
5066 Codeforces 1159A: A pile of stones
5065 Codeforces 1158F: Density of subarrays
5064 Codeforces 1158E: Strange device
5063 Codeforces 1158D: Winding polygonal line
5062 Codeforces 1158C: Permutation recovery
5061 Codeforces 1158B: The minimal unique substring
5060 Codeforces 1158A: The Party and Sweets
5059 Codeforces 1157G: Inverse of Rows and Columns
5058 Codeforces 1157F: Maximum Balanced Circle
5057 Codeforces 1157E: Minimum Array
5056 Codeforces 1157D: N Problems During K Days
5055 Codeforces 1157C2: Increasing Subsequence (hard version)
5054 Codeforces 1157C1: Increasing Subsequence (easy version)
5053 Codeforces 1157B: Long Number
5052 Codeforces 1157A: Reachable Numbers
5051 Codeforces 1156G: Optimizer
5050 Codeforces 1156F: Card Bag
5049 Codeforces 1156E: Special Segments of Permutation
5048 Codeforces 1156D: 0-1-Tree
5047 Codeforces 1156C: Match Points
5046 Codeforces 1156B: Ugly Pairs
5045 Codeforces 1156A: Inscribed Figures
5044 Codeforces 1155F: Delivery Oligopoly
5043 Codeforces 1155E: Guess the Root
5042 Codeforces 1155D: Beautiful Array
5041 Codeforces 1155C: Alarm Clocks Everywhere
5040 Codeforces 1155B: Game with Telephone Numbers
5039 Codeforces 1155A: Reverse a Substring
5038 Codeforces 1154G: Minimum Possible LCM
5037 Codeforces 1154F: Shovels Shop
5036 Codeforces 1154E: Two Teams
5035 Codeforces 1154D: Walking Robot
5034 Codeforces 1154C: Gourmet Cat
5033 Codeforces 1154B: Make Them Equal
5032 Codeforces 1154A: Restoring Three Numbers
5031 Codeforces 1153F: Serval and Bonus Problem
5030 Codeforces 1153E: Serval and Snake
5029 Codeforces 1153D: Serval and Rooted Tree
5028 Codeforces 1153C: Serval and Parenthesis Sequence
5027 Codeforces 1153B: Serval and Toy Bricks
5026 Codeforces 1153A: Serval and Bus
5025 Codeforces 1152F2: Neko Rules the Catniverse (Large Version)
5024 Codeforces 1152F1: Neko Rules the Catniverse (Small Version)
5023 Codeforces 1152E: Neko and Flashback
5022 Codeforces 1152D: Neko and Aki's Prank
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