LeetCode - 1281. Subtract the Product and Sum of Digits of an Integer(Math)

문제

정수 n이 주어지면 숫자의 곱과 숫자의 합 사이의 차이를 반환합니다.

Given an integer number n, return the difference between the product of its digits and the sum of its digits.

https://leetcode.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer/

Example 1:

Input: n = 234
Output: 15
Explanation:
Product of digits = 2 3 4 = 24
Sum of digits = 2 + 3 + 4 = 9
Result = 24 - 9 = 15

Example 2:

Input: n = 4421
Output: 21
Explanation:
Product of digits = 4 4 2 * 1 = 32
Sum of digits = 4 + 4 + 2 + 1 = 11
Result = 32 - 11 = 21

풀이

자바입니다.

class Solution {
    public int subtractProductAndSum(int n) {
        int multi = 1;
        int sum = 0;
        while(n>0){
            int a= n%10;
            multi*=a;
            sum+=a;
            n/=10;
        }
        return multi-sum;
    }
}