Leetcode 1806. Minimum Number of Operations to Reinitialize a Permutation

Given an even n and a fixed reindexing operation on perm, find the minimum positive number of times to apply it to restore the identity permutation — equivalently, compute the order of the induced index permutation by decomposing it into cycles and taking the LCM of their lengths.

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Leetcode 1806. Minimum Number of Operations to Reinitialize a Permutation

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