Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.
Example 1:
Input: 121
Output: true
Example 2:
Input: -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Example 3:
Input: 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
Follow up:
Coud you solve it without converting the integer to a string?
class Solution:
def isPalindrome(self, x):
"""
:type x: int
:rtype: bool
"""
if x < 0:
return False
a = x
temp = []
while x!=0:
temp.append(x%10)
x = int(x/10)
for i in range(len(temp)):
x = x*10+temp[i]
return True if a==x else False