1 public class Solution {
 2     public bool IsPalindrome(int x)
 3     {
 4         if (x < 0)
 5         {
 6             return false;
 7         }
 8 
 9         var rx = Reverse(x);
10         return x == rx;
11     }
12     
13     public int Reverse(int x)
14         {
15 
16             int flag = 1;
17             if (x < 0)
18             {
19                 flag = -1;
20                 x = -1 * x;
21             }
22 
23             var str = x.ToString();
24             var strL = "";
25             var strR = "";
26             var len = str.Length;
27             for (int i = 0; i < len; i++)
28             {
29                 if (i < len - i - 1)
30                 {
31                     if (!string.IsNullOrEmpty(strL) || str[len - i - 1] != '0')
32                     {
33                         strL += str[len - i - 1].ToString();
34                     }
35                     
36                     strR = str[i].ToString() + strR;
37                 }
38                 else if (i == len - i - 1)
39                 {
40                     strL += str[i];
41                     break;
42                 }
43                 else
44                 {
45                     break;
46                 }
47             }
48 
49             str = strL + strR;
50 
51             var min = -1 * Math.Pow(2, 31);
52             var max = Math.Pow(2, 31) - 1;
53 
54             double num = 0;
55             for (var i = 0; i < str.Length; i++)
56             {
57                 num += int.Parse(str[i].ToString()) * Math.Pow(10, str.Length - i - 1);
58                 var signNum = flag * num;
59                 if (signNum> max || signNum < min)
60                 {
61                     return 0;
62                 }
63             }
64             
65             return flag * int.Parse(num.ToString());
66         }
67 }