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)
8071 Codeforces 1731B: Kill Demodogs
8070 Codeforces 1731A: Joey Takes Money
8069 Codeforces 1730F: Almost Sorted
8068 Codeforces 1730E: Maximums and Minimums
8067 Codeforces 1730D: Prefixes and Suffixes
8066 Codeforces 1730C: Minimum Notation
8065 Codeforces 1730B: Meeting on the Line
8064 Codeforces 1730A: Planets
8063 Codeforces 1729G: Cut Substrings
8062 Codeforces 1729F: Kirei and the Linear Function
8061 Codeforces 1729E: Guess the Cycle Size
8060 Codeforces 1729D: Friends and the Restaurant
8059 Codeforces 1729C: Jumping on Tiles
8058 Codeforces 1729B: Decode String
8057 Codeforces 1729A: Two Elevators
8056 Codeforces 1728G: Illumination
8055 Codeforces 1728F: Fishermen
8054 Codeforces 1728E: Red-Black Pepper
8053 Codeforces 1728D: Letter Picking
8052 Codeforces 1728C: Digital Logarithm
8051 Codeforces 1728B: Best Permutation
8050 Codeforces 1728A: Colored Balls: Revisited
8049 Codeforces 1726H: Mainak and the Bleeding Polygon
8048 Codeforces 1726G: A Certain Magical Party
8047 Codeforces 1726F: Late For Work (submissions are not allowed)
8046 Codeforces 1726E: Almost Perfect
8045 Codeforces 1726D: Edge Split
8044 Codeforces 1726C: Jatayu's Balanced Bracket Sequence
8043 Codeforces 1726B: Mainak and Interesting Sequence
8042 Codeforces 1726A: Mainak and Array
8041 Codeforces 1725M: Moving Both Hands
8040 Codeforces 1725L: Lemper Cooking Competition
8039 Codeforces 1725K: Kingdom of Criticism
8038 Codeforces 1725J: Journey
8037 Codeforces 1725I: Imitating the Key Tree
8036 Codeforces 1725H: Hot Black Hot White
8035 Codeforces 1725G: Garage
8034 Codeforces 1725F: Field Photography
8033 Codeforces 1725E: Electrical Efficiency
8032 Codeforces 1725D: Deducing Sortability
8031 Codeforces 1725C: Circular Mirror
8030 Codeforces 1725B: Basketball Together
8029 Codeforces 1725A: Accumulation of Dominoes
8028 Codeforces 1722G: Even-Odd XOR
8027 Codeforces 1722F: L-shapes
8026 Codeforces 1722E: Counting Rectangles
8025 Codeforces 1722D: Line
8024 Codeforces 1722C: Word Game
8023 Codeforces 1722B: Colourblindness
8022 Codeforces 1722A: Spell Check
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