[LeetCode] 345. Reverse Vowels of a String

轉自LeetCode

Write a function that takes a string as input and reverse only the vowels of a string.

Example 1:
Given s = "hello", return "holle".

Example 2:
Given s = "leetcode", return "leotcede".

Note:
The vowels does not include the letter "y".

<Solution>

思考如下

• 用一個 HashSet 來查目前的字母是不是母音

• 用兩個指標，分別從兩端開始找母音，找到就交換

code 如下

Java
C++