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)
11871 AtCoder BCU30-2019: A. Wolf Keyboard
11870 AtCoder BCU30-2018-QUAL: A. Age
11869 AtCoder BCU30-2018: B. Spring Water
11868 AtCoder BCU30-2018: A. Ball
11867 AtCoder AUTUMN_FEST: K. Batch Style Mastermind
11866 AtCoder AUTUMN_FEST: J. Ninja of Train
11865 AtCoder AUTUMN_FEST: I. Pyramid
11864 AtCoder AUTUMN_FEST: H. U・N・C・O
11863 AtCoder AUTUMN_FEST: G. Bit Map
11862 AtCoder AUTUMN_FEST: F. Vinculum
11861 AtCoder AUTUMN_FEST: E. Be Together
11860 AtCoder AUTUMN_FEST: D. Don't Think Seriously!
11859 AtCoder AUTUMN_FEST: C. Cards
11858 AtCoder AUTUMN_FEST: B. 3Match
11857 AtCoder AUTUMN_FEST: A. Irregular Contest
11856 AtCoder ATCODER11LIVE: A. Turn Right
11855 AtCoder ATC002: C. 最適二分探索木
11854 AtCoder ATC002: B. n^p mod m
11853 AtCoder ASPROCON9: A. Shift Scheduling
11852 AtCoder ASPROCON8: A. Automated Painting Line
11851 AtCoder ASPROCON7: A. Car Assembly Line
11850 AtCoder CF16-TOURNAMENT-ROUND1-OPEN: B. Problem where Commas Separate Digits
11849 AtCoder CF16-TOURNAMENT-ROUND2-OPEN: A. Takahashi is Missing!
11848 AtCoder CF16-TOURNAMENT-ROUND3-OPEN: A. Struck Out
11847 AtCoder CF16-TOURNAMENT-ROUND1-OPEN: A. Graph
11846 AtCoder CF16-TOURNAMENT-ROUND3-OPEN: B. Compression
11845 AtCoder CF16-TOURNAMENT-ROUND2-OPEN: B. Takahashi the Magician
11844 AtCoder CF17-TOURNAMENT-ROUND3-OPEN: F. Unicyclic Graph Counting
11843 AtCoder CF17-TOURNAMENT-ROUND3-OPEN: E. Black Cats Deployment
11842 AtCoder CF17-TOURNAMENT-ROUND1-OPEN: D. Ancient Tree Record
11841 AtCoder CF17-TOURNAMENT-ROUND1-OPEN: C. Paired Parentheses
11840 AtCoder CF17-TOURNAMENT-ROUND2-OPEN: B. Many Swaps Sorting
11839 AtCoder CF17-TOURNAMENT-ROUND2-OPEN: A. Colorful MST
11838 AtCoder ARC164: F. Subtree Reversi
11837 AtCoder ARC164: E. Segment-Tree Optimization
11836 AtCoder ARC164: D. 1D Coulomb
11835 AtCoder ARC164: C. Reversible Card Game
11834 AtCoder ARC164: B. Switching Travel
11833 AtCoder ARC164: A. Ternary Decomposition
11832 AtCoder ARC163: F. Many Increasing Problems
11831 AtCoder ARC163: E. Chmin XOR Game
11830 AtCoder ARC163: D. Sum of SCC
11829 AtCoder ARC163: C. Harmonic Mean
11828 AtCoder ARC163: B. Favorite Game
11827 AtCoder ARC163: A. Divide String
11826 AtCoder ARC162: F. Montage
11825 AtCoder ARC162: E. Strange Constraints
11824 AtCoder ARC162: D. Smallest Vertices
11823 AtCoder ARC162: C. Mex Game on Tree
11822 AtCoder ARC162: B. Insertion Sort 2
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