345. Reverse Vowels of a String
Easy
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 lower and upper cases, more than once.Example 1:
Input: s = "hello"
Output:
"holle"
Example 2:
Input: s = "leetcode"
Output:
"leotcede"
Constraints:
1 <= s.length <= 3 * 105sconsist of printable ASCII characters.
Runtime: 4 ms, faster than 87.88%
Memory Usage: 3.9 MB, less than 100%
func reverseVowels(s string) string {
left := 0
right := len(s) - 1
newStr := []byte(s)
for left < right {
if checkVowels(newStr[left]) && checkVowels(newStr[right]) {
tmp := newStr[left]
newStr[left] = newStr[right]
newStr[right] = tmp
left++
right--
} else if !checkVowels(newStr[left]) {
left++
} else if !checkVowels(newStr[right]) {
right--
}
}
return string(newStr)
}
func checkVowels(char byte) bool {
vowels := []byte{'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'}
for i := 0; i < len(vowels); i++ {
if char == vowels[i] { return true }
}
return false
}
Last modified 6mo ago