DSA Section簡単

Merge Sort

Detailed guide and Python implementation for the 'Merge Sort' problem.

問題提起

簡単

Write a function merge_sort(arr) that sorts a list of integers arr in ascending order using the Merge Sort algorithm and returns the sorted list.

制約
  • 0 <= len(arr) <= 10^4
  • -10^5 <= arr[i] <= 10^5

Example 1
Input
arr = [38, 27, 43, 3, 9, 82, 10]
Output
[3, 9, 10, 27, 38, 43, 82]
Explanation

The list is divided in half recursively, sorted, and then merged back together.

Need a Hint?
Consider using Sorting-specific data structures like sets or heaps.
Edge Cases to Watch
  • Empty input structures
  • Single element inputs
  • Large numerical bounds

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