leetcode刷题笔记(Golang)--9. Palindrome Number

原题链接9. Palindrome Number

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.

Example 1:

Input: 121
Output: true
Example 2:

Input: -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Example 3:

Input: 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.

解题思路：花花酱

func isPalindrome(x int) bool {
        if x < 0 {
        return false
    }
    bits := int(math.Log10(float64(x))) + 1
    div := int(math.Pow10(bits - 1))
    for i := 0; i < bits/2; i++ {
        if x/div != x%10 {
            return false
        }
        x = (x - x/div*div) / 10
        div /= 100
    }
    return true
}