leetcode-go/leetcode/easy/680.valid-palindrome-ii.go

func validPalindrome(s string) bool {
	for l, r := 0, len(s)-1; l < r; l, r = l+1, r-1 {
		if s[l] != s[r] {
			return isPalindrome(s, l+1, r) || isPalindrome(s, l, r-1)
		}
	}
	return true
}

func isPalindrome(s string, i, j int) bool {
	for ; i < j; i, j = i+1, j-1 {
		if s[i] != s[j] {
			return false
		}
	}
	return true
}