Leetcode 3424. Minimum Cost to Make Arrays Identical

Given two equal-length arrays, you can pay k to split arr into contiguous blocks and permute them (one such operation can realize any permutation) and/or pay |x| per unit to change individual elements; find the minimum total cost to make arr equal brr. The core challenge is trading a fixed-cost reordering (enabling an optimal value matching) against per-element adjustment costs, i.e., choose whether to keep positions or pay to permute and then minimize sum of absolute differences.