9. Palindrome Number.c++

Given an integer x, return true if x is palindrome integer.

An integer is a palindrome when it reads the same backward as forward.

For example, 121 is a palindrome while 123 is not.
 

Example 1:

Input: x = 121
Output: true
Explanation: 121 reads as 121 from left to right and from right to left.
Example 2:

Input: x = -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.


#SOLUTION  //C++

class Solution {
public:
bool isPalindrome(int x) {
    if( x<0 || ( x % 10==0 &&x!=0))
        return false;

    int revno = 0;
    while(x>revno){
            revno=revno*10 + x%10;
                x=x/10;
        }
    return x==revno || x==revno/10;
    
}
};