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)
14871 AtCoder WUPC2ND: B. 雨上がり
14870 AtCoder WUPC2ND: A. 団子とうさぎ
14869 AtCoder WUPC2019: J. Color Ball
14868 AtCoder WUPC2019: I. Ramen
14867 AtCoder WUPC2019: H. Doki Doki Programming Clubs!
14866 AtCoder WUPC2019: G. Teishoku
14865 AtCoder WUPC2019: F. RPG
14864 AtCoder WUPC2019: E. Artist
14863 AtCoder WUPC2019: D. Choose Your Characters
14862 AtCoder WUPC2019: C. Permutation City
14861 AtCoder WUPC2019: B. 10 puzzle
14860 AtCoder WUPC2019: A. WAsedAC
14859 AtCoder WUPC2012: F. 最後の問題
14858 AtCoder WUPC2012: E. 会場への道
14857 AtCoder WUPC2012: D. 三角パズル
14856 AtCoder WUPC2012: C. 自宅からの脱出
14855 AtCoder WUPC2012: B. パスワード
14854 AtCoder WUPC2012: A. 招待状
14853 AtCoder WTF19-OPEN: E. e
14852 AtCoder WTF19-OPEN: D. Distinct Boxes
14851 AtCoder WTF19-OPEN: C2. Triangular Lamps Hard
14850 AtCoder WTF19-OPEN: C1. Triangular Lamps Easy
14849 AtCoder WTF19-OPEN: B. Multiple of Nine
14848 AtCoder WTF19-OPEN: A. Magic
14847 AtCoder WN2017_1: A. Satellite data compression
14846 AtCoder UTPC2022: O. Move to Rest
14845 AtCoder UTPC2022: N. 01 String Game
14844 AtCoder UTPC2022: M. Minimize XOR by Redistribution
14843 AtCoder UTPC2022: L. Small RPS Tournament
14842 AtCoder UTPC2022: K. Grid Coloring
14841 AtCoder UTPC2022: J. Divide and Sort
14840 AtCoder UTPC2022: I. Which must be deleted?
14839 AtCoder UTPC2022: H. Digit Slot
14838 AtCoder UTPC2022: G. K flipping
14837 AtCoder UTPC2022: F. K inversions
14836 AtCoder UTPC2022: E. Parallel Swapping
14835 AtCoder UTPC2022: D. Balance
14834 AtCoder UTPC2022: C. Nim is Time-consuming
14833 AtCoder UTPC2022: B. Cross Laser Beam
14832 AtCoder UTPC2022: A. Shuffle and GCD
14831 AtCoder UTPC2021: N. Tree Swapping
14830 AtCoder UTPC2021: M. Open the Door
14829 AtCoder UTPC2021: L. Maze Game
14828 AtCoder UTPC2021: K. Divide Polynomials by #Subset Sums
14827 AtCoder UTPC2021: J. Do you like Interval Scheduling Problems?
14826 AtCoder UTPC2021: I. Card Decks
14825 AtCoder UTPC2021: H. Quantum Multiplication
14824 AtCoder UTPC2021: G. Matrix Compressor
14823 AtCoder UTPC2021: F. Red and Blue Medals
14822 AtCoder UTPC2021: E. Bounding Box
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