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Solution: Sort an Array

Explore how to implement heap sort to sort an integer array ascendingly in-place. Understand building a max heap, repeatedly extracting the largest element, and maintaining O(n log n) time with minimal extra space. This lesson clarifies heap sort’s efficiency and space benefits compared to other algorithms.

Statement

Given an integer array, nums, sort it in ascending order and return the sorted array.

You must implement the sorting algorithm yourself; do not use any built-in sorting functions. The solution must run in O(nlogn)O(n \log n) time and use the minimum possible extra space.

Constraints:

  • 11 \leq nums.length ...