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

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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
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Hints

Hint 1
How to compute all digits of the number ?
Hint 2
Use modulus operator (%) to compute the last digit.
Hint 3
Generalise modulus operator idea to compute all digits.