Determine whether an integer is a palindrome. Do this without extra space.
public class Solution {
public boolean isPalindrome(int x) {
if (x < 0) {
return false;
}
int div = 1;
while (x / div >= 10) {
div *= 10;
}
while (x != 0) {
int left = x / div;
int right = x % 10;
if (left != right) {
return false;
}
x = (x % div) / 10;
div /= 100;
}
return true;
}
}