LeetCode :Palindrome Number

Problem:

Link

#include<bits/stdc++.h>
using namespace std;
class Solution 
{
    public:
    bool isPalindrome(int x) 
    {
        if(x<0)
 return false;
 stringstream ss;
 ss<<x;
 string s1="",s,temp;
 s=ss.str();
 for(int i=0;i<s.length();i++)
 {
  if(s[i]!=' ')
  s1+=s[i];
 }
 temp=s1;
 reverse(s1.begin(),s1.end());
 return s1==temp?true:false;
    }
};
int main()
{
 Solution s;
 cout<<s.isPalindrome(131)<<endl;
 cout<<s.isPalindrome(-456)<<endl;
}