_1281.java

package com.fishercoder.solutions;

/**
 * 1281. Subtract the Product and Sum of Digits of an Integer
 *
 * Given an integer number n, return the difference between the product of its digits and the sum of its digits.
 *
 * 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
 *
 * Constraints:
 * 1 <= n <= 10^5
 * */
public class _1281 {
    public static class Solution1 {
        public int subtractProductAndSum(int n) {
            int sum = 0;
            int product = 1;
            while (n > 0) {
                int digit = n % 10;
                n /= 10;
                sum += digit;
                product *= digit;
            }
            return product - sum;
        }
    }
}