3754. Concatenate Non-Zero Digits and Multiply by Sum I

You are given an integer n.

Form a new integer x by concatenating all the non-zero digits of n in their original order. If there are no non-zero digits, x = 0.

Let sum be the sum of digits in x.

Return an integer representing the value of x * sum.

Example 1

Input: n = 10203004
Output: 12340
Explanation:
- The non-zero digits are 1, 2, 3, and 4. Thus, x = 1234.
- The sum of digits is sum = 1 + 2 + 3 + 4 = 10.
- Therefore, the answer is x * sum = 1234 * 10 = 12340.

Example 2

Input: n = 1000
Output: 1
Explanation:
- The non-zero digit is 1, so x = 1 and sum = 1.
- Therefore, the answer is x * sum = 1 * 1 = 1.

Constraints

• 0 <= n <= 10^9