2020-9-3
经典题目却一波三折，提交的时候忽略了负数的样例，偷懒用了string和stl，只是逐位把数字加入到字符串中。
https://leetcode-cn.com/problems/palindrome-number/
class Solution { public: bool isPalindrome(int x) { if(x < 0) return false; string s1 = ""; while(x) { s1.push_back(x%10 + '0'); x /= 10; } string s2 = s1; reverse(s1.begin(),s1.end()); return s1 == s2; } };
