Let's call an array Nums[0.. 2n] plateau-valley if Nums[0] < Nums[1] 2 Nums[2] s Nums[3] 2...s Nums[2n-1] 2 Nums[2n] (e.g. 3, 100, 50, 75, 33, 80, 17, 90, 60, 69, 11.) 75. (11 Given a completely unsorted array [0. 2n] of numbers, describe an algorithm that is O(n) or better which takes the unsorted array as an input and returns a permutation of the array to result in a plateau-valley array.

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