原題：

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

Example 1:

Input: "hello" Output: "holle"

Example 2:

Input: "leetcode" Output: "leotcede"

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

只翻轉元音字母（？？？這題有病），結果：

Success

Runtime:?4 ms, faster than?99.92%?of?C++?online submissions for?Reverse Vowels of a String.

Memory Usage:?9.9 MB, less than?76.01%?of?C++?online submissions for?Reverse Vowels of a String.

代碼：

class Solution { public:string reverseVowels(string s) {int i=0,j=s.size()-1;while(j>i){while(s[i]!='a'&&s[i]!='e'&&s[i]!='i'&&s[i]!='o'&&s[i]!='u'&&s[i]!='A'&&s[i]!='E'&&s[i]!='I'&&s[i]!='O'&&s[i]!='U'&&i<j){i++;}while(s[j]!='a'&&s[j]!='e'&&s[j]!='i'&&s[j]!='o'&&s[j]!='u'&&s[j]!='A'&&s[j]!='E'&&s[j]!='I'&&s[j]!='O'&&s[j]!='U'&&i<j){j--;}if(j<=i){break;}swap(s[i++],s[j--]);}return s;} };

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