Reversing an integer means to reverse all its digits.
2021
gives 1202
. Reversing 12300
gives 321
as the leading zeros are not retained.Given an integer num
, reverse num
to get reversed1
, then reverse reversed1
to get reversed2
. Return true
if reversed2
equals num
. Otherwise return false
.
Example 1:
Input: num = 526 Output: true Explanation: Reverse num to get 625, then reverse 625 to get 526, which equals num.
Example 2:
Input: num = 1800 Output: false Explanation: Reverse num to get 81, then reverse 81 to get 18, which does not equal num.
Example 3:
Input: num = 0 Output: true Explanation: Reverse num to get 0, then reverse 0 to get 0, which equals num.
Constraints:
0 <= num <= 106
struct Solution;
impl Solution {
fn is_same_after_reversals(num: i32) -> bool {
num == 0 || num % 10 != 0
}
}
#[test]
fn test() {
let num = 526;
let res = true;
assert_eq!(Solution::is_same_after_reversals(num), res);
let num = 1800;
let res = false;
assert_eq!(Solution::is_same_after_reversals(num), res);
let num = 0;
let res = true;
assert_eq!(Solution::is_same_after_reversals(num), res);
}