Warehouse Tree Relabel Swaps
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Warehouse Tree Relabel Swaps
A complete warehouse tree was flattened into a level-order array. A migration tool needs the flattened values to appear in increasing order. In one operation, the tool may swap the values at any two positions of the flattened array. Values are distinct. Determine the minimum number of swaps needed to transform the current flattened order into sorted increasing order. Input Format: You are given an integer array levelOrder. Output Format: Return the minimum number of arbitrary swaps required to sort the array.
Examples
levelOrder = [5, 6, 7, 8, 9]
0
Explanation: Sorting [5, 6, 7, 8, 9] into [5, 6, 7, 8, 9] creates cycle(s) none. The cycles need 0 swap(s), so the output is 0.
Approach hint
Sorting tells where each element must go.
Common mistake
Skipping assumptions, edge cases, or trade-offs can make an otherwise good answer feel incomplete.