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)
11621 AtCoder ARC128: E. K Different Values
11620 AtCoder ARC128: D. Neq Neq
11619 AtCoder ARC128: C. Max Dot
11618 AtCoder ARC128: B. Balls of Three Colors
11617 AtCoder ARC128: A. Gold and Silver
11616 AtCoder ARC127: F. ┬▒AB
11615 AtCoder ARC127: E. Priority Queue
11614 AtCoder ARC127: D. Sum of Min of Xor
11613 AtCoder ARC127: C. Binary Strings
11612 AtCoder ARC127: B. Ternary Strings
11611 AtCoder ARC127: A. Leading 1s
11610 AtCoder ARC126: F. Affine Sort
11609 AtCoder ARC126: E. Infinite Operations
11608 AtCoder ARC126: D. Pure Straight
11607 AtCoder ARC126: C. Maximize GCD
11606 AtCoder ARC126: B. Cross-free Matching
11605 AtCoder ARC126: A. Make 10
11604 AtCoder ARC125: F. Tree Degree Subset Sum
11603 AtCoder ARC125: E. Snack
11602 AtCoder ARC125: D. Unique Subsequence
11601 AtCoder ARC125: C. LIS to Original Sequence
11600 AtCoder ARC125: B. Squares
11599 AtCoder ARC125: A. Dial Up
11598 AtCoder ARC124: F. Chance Meeting
11597 AtCoder ARC124: E. Pass to Next
11596 AtCoder ARC124: D. Yet Another Sorting Problem
11595 AtCoder ARC124: C. LCM of GCDs
11594 AtCoder ARC124: B. XOR Matching 2
11593 AtCoder ARC124: A. LR Constraints
11592 AtCoder ARC123: F. Insert Addition
11591 AtCoder ARC123: E. Training
11590 AtCoder ARC123: D. Inc, Dec - Decomposition
11589 AtCoder ARC123: C. 1, 2, 3 - Decomposition
11588 AtCoder ARC123: B. Increasing Triples
11587 AtCoder ARC123: A. Arithmetic Sequence
11586 AtCoder ARC122: F. Domination
11585 AtCoder ARC122: E. Increasing LCMs
11584 AtCoder ARC122: D. XOR Game
11583 AtCoder ARC122: C. Calculator
11582 AtCoder ARC122: B. Insurance
11581 AtCoder ARC122: A. Many Formulae
11580 AtCoder ARC121: F. Logical Operations on Tree
11579 AtCoder ARC121: E. Directed Tree
11578 AtCoder ARC121: D. 1 or 2
11577 AtCoder ARC121: C. Odd Even Sort
11576 AtCoder ARC121: B. RGB Matching
11575 AtCoder ARC121: A. 2nd Greatest Distance
11574 AtCoder ARC120: F2. Wine Thief
11573 AtCoder ARC120: F. Wine Thief
11572 AtCoder ARC120: E. 1D Party
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