leetcode-9 Palindrome Number

Posted 2021-01-17 tingweichen

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.

想法：先将整数型转变成字符型，然后反转，再去和原字符比较。

class Solution {
public:
    bool isPalindrome(int x) {
        string s = to_string(x);
        string temp = s;
        reverse(s.begin(),s.end());
        return temp ==  s;
    }
};