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)
7071 Codeforces 1548C: The Three Little Pigs
7070 Codeforces 1548B: Integers Have Friends
7069 Codeforces 1548A: Web of Lies
7068 Codeforces 1547G: How Many Paths?
7067 Codeforces 1547F: Array Stabilization (GCD version)
7066 Codeforces 1547E: Air Conditioners
7065 Codeforces 1547D: Co-growing Sequence
7064 Codeforces 1547C: Pair Programming
7063 Codeforces 1547B: Alphabetical Strings
7062 Codeforces 1547A: Shortest Path with Obstacle
7061 Codeforces 1546B: AquaMoon and Stolen String
7060 Codeforces 1546A: AquaMoon and Two Arrays
7059 Codeforces 1545F: AquaMoon and Potatoes
7058 Codeforces 1545E2: AquaMoon and Time Stop (hard version)
7057 Codeforces 1545E1: AquaMoon and Time Stop (easy version)
7056 Codeforces 1545D: AquaMoon and Wrong Coordinate
7055 Codeforces 1545C: AquaMoon and Permutations
7054 Codeforces 1545B: AquaMoon and Chess
7053 Codeforces 1545A: AquaMoon and Strange Sort
7052 Codeforces 1543E: The Final Pursuit
7051 Codeforces 1543D2: RPD and Rap Sheet (Hard Version)
7050 Codeforces 1543D1: RPD and Rap Sheet (Easy Version)
7049 Codeforces 1543C: Need for Pink Slips
7048 Codeforces 1543B: Customising the Track
7047 Codeforces 1543A: Exciting Bets
7046 Codeforces 1542E2: Abnormal Permutation Pairs (hard version)
7045 Codeforces 1542E1: Abnormal Permutation Pairs (easy version)
7044 Codeforces 1542D: Priority Queue
7043 Codeforces 1542C: Strange Function
7042 Codeforces 1542B: Plus and Multiply
7041 Codeforces 1542A: Odd Set
7040 Codeforces 1541B: Pleasant Pairs
7039 Codeforces 1541A: Pretty Permutations
7038 Codeforces 1540E: Tasty Dishes
7037 Codeforces 1540D: Inverse Inversions
7036 Codeforces 1540C2: Converging Array (Hard Version)
7035 Codeforces 1540C1: Converging Array (Easy Version)
7034 Codeforces 1540B: Tree Array
7033 Codeforces 1540A: Great Graphs
7032 Codeforces 1539F: Strange Array
7031 Codeforces 1539E: Game with Cards
7030 Codeforces 1539D: PriceFixed
7029 Codeforces 1539C: Stable Groups
7028 Codeforces 1539B: Love Song
7027 Codeforces 1539A: Contest Start
7026 Codeforces 1538G: Gift Set
7025 Codeforces 1538F: Interesting Function
7024 Codeforces 1538E: Funny Substrings
7023 Codeforces 1538D: Another Problem About Dividing Numbers
7022 Codeforces 1538C: Number of Pairs
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