Subtract the Product and Sum of Digits of an Integer · Interview Problem

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Leetcode

Easy

Math

Number Theory

Simulation

Subtract the Product and Sum of Digits of an Integer

Compute the difference between the product of an integer's digits and the sum of its digits.

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Subtract Product and Sum of Digits

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Problem Statement

Given a positive integer $n$ , consider the digits of $n$ individually. Compute:

the product of all digits
the sum of all digits

Return the value of product - sum.

The task is purely about digit-by-digit processing and simple arithmetic.

Input Format

A single integer $n$ .
You may assume $n$ is positive.

Output Format

Return an integer representing the product of the digits of $n$ minus the sum of the digits of $n$ .

Constraints

$1 \le n$
Digits are processed in base 10
The exact upper bound is not required for practice purposes

Examples

Sample cases returned by the problem API.

Example 1

Input

n = 234

Output

Explanation

Digits are 2, 3, and 4. Product = 2 × 3 × 4 = 24. Sum = 2 + 3 + 4 = 9. Difference = 24 - 9 = 15.

Example 2

Input

n = 4421

Output

Explanation

Digits are 4, 4, 2, and 1. Product = 32. Sum = 11. Difference = 32 - 11 = 21.

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