2. Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

class Solution {
public:
bool isPalindrome(int x) {

    if(x < 0 || (x % 10 == 0 && x != 0)) {
        return false;
    }
    int revertedNumber = 0;
    while(x > revertedNumber) {
        revertedNumber = revertedNumber * 10 + x % 10;
        x /= 10;
    }
    return x == revertedNumber || x == revertedNumber/10;
}
};