#1281 Subtract the Product and Sum of Digits of an Integer.java

//https://leetcode.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer/
class Solution {
    public int subtractProductAndSum(int n) {
        int prod = 1;
        int sum = 0;
        while(n > 0) {
            int r = n % 10;
            prod *= r;
            sum += r;
            n /= 10;
        }
        return prod - sum;
    }
}