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Minimum Moves to Equal Array Elements II [Medium] — Median Target
Find the minimum total moves to make all array elements equal by targeting the median value.
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Array Nesting [Medium] — Cycle Length Tracking
Find the longest nested set S(k) in a permutation array by tracing cycles with visited marking in O(n) time.
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Advantage Shuffle [Medium] — Greedy Strongest Beat Weakest
Rearrange nums to maximize advantage over B using a greedy strategy: assign the smallest winning card, else discard the smallest.
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Subsets II [Medium] — Backtracking with Duplicate Skip
Generate all unique subsets from an array with duplicates by sorting and skipping repeated elements at each recursion level.
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Rotate String [Easy] — String Contains Trick
Check if string B is a rotation of A by checking if B appears in A+A using a substring search.
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