1 class Solution { 2 public: 3     bool isPalindrome(int x) { 4         if(x < 0)    5             return false; 6         int div = 1; 7         int xorg = x; 8         while(x >= 10) 9         {10             div = div*10;11             x = x/10;12         }13         x = xorg;14         while(x > 0 && div>0)15         {16             int r = x%10;17             int l = x/div;18             if(l != r)19             {20                 return false;21             }22             x = (x%div)/10;23             div = div/100;24         }25         return true;26     }27 };