[9. Palindrome Number] #leetcode

9_0914.java

class Solution {
    public boolean isPalindrome(int x) {
        if (x < 0 || (x!=0 && x%10==0)) return false;
        int rev = 0;
        while (x > rev) {
            rev = rev * 10 + x % 10;
            x = x/10;
        }
        return (x == rev || x == rev/10);
    }
}