用Rust刷leetcode第九题

Problem

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.

Example

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.

Solution

impl Solution {
    pub fn is_palindrome(x: i32) -> bool {

        if x < 0 {
            return false;
        }

        if x < 10 {
            return true;
        }

        let mut temp = x;
        let mut reverse = 0;
        while temp > 0 {
            reverse = reverse*10 + temp%10;
            temp = temp/10;
        }

        if x == (reverse&x) {
            return true;
        } else {
            return false;
        }
    }
}
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