Palindrome number

Math

60.3% acceptance

Mar 2, 2026

15698

2922

Given an integer x, return true if x is a palindrome, and false otherwise.

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn is_palindrome(x: i32) -> bool {
    if x < 0 || (x % 10 == 0 && x != 0) {
      return false;
    }
    let mut n = x;
    let mut rev = 0;
    while n > rev {
      rev = rev * 10 + n % 10;
      n /= 10;
    }
    n == rev || n == rev / 10
  }
}