leetCode练题——9. Palindrome Number

1、题目

9. Palindrome Number

 

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?

 
2、我的解法

 # -*- coding: utf-8 -*-
 # @Time    : 2020/1/27 17:28
 # @Author  : SmartCat0929
 # @Email   : 1027699719@qq.com
 # @Link    : https://github.com/SmartCat0929
 # @Site    :
 # @File    : 9. Palindrome Number.py
 
 class Solution:
     def isPalindrome(self, x: int) -> bool:
         if x > 0:
             r = 0
             y = str(x)
             n = len(y)
             d = []
             for i in (y):
                 d.append(i)
             for j in range(n):
                 c = d.pop()
                 r = r + c
                 v = int(r)
             if v == x:
                 return v
             else:
                 return 0
         elif x== 0:
             return True
         else:
             return 0
 
 print(Solution().isPalindrome(12321))