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)
24847 AtCoder JOI2024HO: E. 道路網の整備 2 (Road Service 2)
24846 AtCoder JOI2024HO: D. プレゼント交換 (Gift Exchange)
24845 AtCoder JOI2024HO: C. マラソン大会 2 (Marathon Race 2)
24844 AtCoder JOI2024HO: B. 建設事業 2 (Construction Project 2)
24843 AtCoder JOI2024HO: A. 室温 (Room Temperature)
24842 AtCoder ARC171: F. Both Reversible
24841 AtCoder ARC171: E. Rookhopper's Tour
24840 AtCoder ARC171: D. Rolling Hash
24839 AtCoder ARC171: C. Swap on Tree
24838 AtCoder ARC171: B. Chmax
24837 AtCoder ARC171: A. No Attacking
24836 AtCoder ABC340: G. Leaf Color
24835 AtCoder ABC340: F. S = 1
24834 AtCoder ABC340: E. Mancala 2
24833 AtCoder ABC340: D. Super Takahashi Bros.
24832 AtCoder ABC340: C. Divide and Divide
24831 AtCoder ABC340: B. Append
24830 AtCoder ABC340: A. Arithmetic Progression
24829 AtCoder ABC339: G. Smaller Sum
24828 AtCoder ABC339: F. Product Equality
24827 AtCoder ABC339: E. Smooth Subsequence
24826 AtCoder ABC339: D. Synchronized Players
24825 AtCoder ABC339: C. Perfect Bus
24824 AtCoder ABC339: B. Langton's Takahashi
24823 AtCoder ABC339: A. TLD
24793 AtCoder JOIG2024-OPEN: F. 感染シミュレーション (Infection Simulation)
24792 AtCoder JOIG2024-OPEN: E. 名前 (Name)
24791 AtCoder JOIG2024-OPEN: D. たくさんの数字 (Many Digits)
24790 AtCoder JOIG2024-OPEN: C. 座席 2 (Seats 2)
24789 AtCoder JOIG2024-OPEN: B. ダンス (Dance)
24788 AtCoder JOIG2024-OPEN: A. 三連続 (Three Consecutive)
24787 AtCoder ABC338: G. evall
24786 AtCoder ABC338: F. Negative Traveling Salesman
24785 AtCoder ABC338: E. Chords
24784 AtCoder ABC338: D. Island Tour
24783 AtCoder ABC338: C. Leftover Recipes
24782 AtCoder ABC338: B. Frequency
24781 AtCoder ABC338: A. Capitalized?
24690 AtCoder XMASCON23: H. How to Pose Such a Problem
24689 AtCoder XMASCON23: G. Group Structure
24688 AtCoder XMASCON23: F. Failed Failure Link
24687 AtCoder XMASCON23: E. Exponent of PI
24686 AtCoder XMASCON23: D. Distance Construction
24685 AtCoder XMASCON23: C. Clamp Clamp Clamp
24684 AtCoder XMASCON23: B. Beautiful Rotation
24683 AtCoder XMASCON23: A. Art Irrationnel
24682 AtCoder PAST16-OPEN: O. 数列の足し算
24681 AtCoder PAST16-OPEN: N. ソートと関数
24680 AtCoder PAST16-OPEN: M. 線分の交差判定
24679 AtCoder PAST16-OPEN: L. 平均クエリ
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