comefrom: <qiyuangong>009_Palindrome_Number_2.java
code: public boolean isPalindrome(int x) {
          if (x < 0) return false;
          int div = 1;
          while ( x / div >= 10) {
              div *= 10;
          }
          while (x !=0) {
              int l = x / div;
              int r = x % 10;
              if (l != r) return false;
              x = (x % div) / 10;
              div /= 100;
          }
          return true;
      }
masked: public boolean var_0 ( int var_1 ) {
    if ( var_1 < 0 ) return false ;
    int var_2 = 1 ;
    while ( var_1 / var_2 >= 10 ) {
      var_2 *= 10 ;
    }
    while ( var_1 != 0 ) {
      int var_3 = var_1 / var_2 ;
      int var_4 = var_1 % 10 ;
      if ( var_3 != var_4 ) return false ;
      var_1 = ( var_1 % var_2 ) / 10 ;
      var_2 /= 100 ;
    }
    return true ;
  }
  