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)
7871 Codeforces 1696E: Placing Jinas
7870 Codeforces 1696D: Permutation Graph
7869 Codeforces 1696C: Fishingprince Plays With Array
7868 Codeforces 1696B: NIT Destroys the Universe
7867 Codeforces 1696A: NIT orz!
7866 Codeforces 1695E: Ambiguous Dominoes
7865 Codeforces 1695D2: Tree Queries (Hard Version)
7864 Codeforces 1695D1: Tree Queries (Easy Version)
7863 Codeforces 1695C: Zero Path
7862 Codeforces 1695B: Circle Game
7861 Codeforces 1695A: Subrectangle Guess
7860 Codeforces 1694B: Paranoid String
7859 Codeforces 1694A: Creep
7858 Codeforces 1693F: I Might Be Wrong
7857 Codeforces 1693E: Outermost Maximums
7856 Codeforces 1693D: Decinc Dividing
7855 Codeforces 1693C: Keshi in Search of AmShZ
7854 Codeforces 1693B: Fake Plastic Trees
7853 Codeforces 1693A: Directional Increase
7852 Codeforces 1692H: Gambling
7851 Codeforces 1692G: 2^Sort
7850 Codeforces 1692F: 3SUM
7849 Codeforces 1692E: Binary Deque
7848 Codeforces 1692D: The Clock
7847 Codeforces 1692C: Where's the Bishop?
7846 Codeforces 1692B: All Distinct
7845 Codeforces 1692A: Marathon
7844 Codeforces 1691F: K-Set Tree
7843 Codeforces 1691E: Number of Groups
7842 Codeforces 1691D: Max GEQ Sum
7841 Codeforces 1691C: Sum of Substrings
7840 Codeforces 1691B: Shoe Shuffling
7839 Codeforces 1691A: Beat The Odds
7838 Codeforces 1690G: Count the Trains
7837 Codeforces 1690F: Shifting String
7836 Codeforces 1690E: Price Maximization
7835 Codeforces 1690D: Black and White Stripe
7834 Codeforces 1690C: Restoring the Duration of Tasks
7833 Codeforces 1690B: Array Decrements
7832 Codeforces 1690A: Print a Pedestal (Codeforces logo?)
7831 Codeforces 1689E: ANDfinity
7830 Codeforces 1689D: Lena and Matrix
7829 Codeforces 1689C: Infected Tree
7828 Codeforces 1689B: Mystic Permutation
7827 Codeforces 1689A: Lex String
7826 Codeforces 1688C: Manipulating History
7825 Codeforces 1688B: Patchouli's Magical Talisman
7824 Codeforces 1688A: Cirno's Perfect Bitmasks Classroom
7823 Codeforces 1687F: Koishi's Unconscious Permutation
7822 Codeforces 1687E: Become Big For Me
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