Interview Classic 150 Questions P9 Palindrome Number

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Timeline

Timeline

2025-11-26

init

Mathematics

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Problem:

P9 Palindrome Number

https://leetcode.cn/problems/palindrome-number/description/?envType=study-plan-v2&envId=top-interview-150

to_string just compare strings directly

#include <string>
#include <algorithm>
using std::string;

class Solution {
    public:
	bool isPalindrome(int x)
	{
		if (x < 0) {
			return false;
		}
		string s1 = std::to_string(x);
		string s2(s1);
		std::reverse(s2.begin(), s2.end());
		if (s1.compare(s2) == 0) {
			return true;
		}
		return false;
	}
};