Leetcode_9

bool isPalindrome(int x) {    if(x<0)       return false;    int reverseNum = reverse(x);    return reverseNum == x;}int reverse(int x){    int result = 0;    while(x){        int tail = x%10;        int newResult = result*10 + tail;        if((newResult - tail)/10 != result)        {            return 0;        }        result = newResult;        x /= 10;    }    return result;}