# Leetcode 345 - Reverse vowels of a string

Note:

• Use 2D array to initialize a map.
• Use Double pointers.

Question:

Given a string s, reverse only all the vowels in the string and return it.

The vowels are ‘a‘, ‘e‘, ‘i‘, ‘o‘, and ‘u‘, and they can appear in both cases.

Example:

Code: