Given a positive integer n, return the smallest positive integer that is a multiple of both 2 and n.
Example 1:
Input: n = 5
Output: 10
Explanation: The smallest multiple of both 5 and 2 is 10.
Example 2:
Input: n = 6
Output: 6
Explanation: The smallest multiple of both 6 and 2 is 6. Note that a number is a multiple of itself.
Constraints:
1 <= n <= 150
- A guaranteed way to find a multiple of 2 and n is to multiply them together. When is this the answer, and when is there a smaller answer?
- There is a smaller answer when n is even.
impl Solution {
pub fn smallest_even_multiple(n: i32) -> i32 {
if n % 2 == 0 {
return n;
} else {
return n * 2;
}
}
}