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Algorithms Problem Solving: Subtract product and sum

teekay profile image TK Originally published at leandrotk.github.io ・2 min read

Algorithms Problem Solving Series (23 Part Series)

1) Algorithms Problem Solving: Jewels and Stones 2) Algorithms Problem Solving: Ransom Note 3 ... 21 3) Algorithms Problem Solving: Sum of nodes 4) Algorithms Problem Solving: Subtract product and sum 5) Algorithms Problem Solving: Cloned Binary Tree 6) Algorithms Problem Solving: Group the people 7) Algorithms Problem Solving: Equal Reversed Arrays 8) Algorithms Problem Solving: Even Number of Digits 9) Algorithms Problem Solving: Reduce to zero 10) Algorithms Problem Solving: Deepest Leaves Sum 11) Algorithms Problem Solving: Tree to greater sum 12) Algorithms Problem Solving: to Lower case 13) Algorithms Problem Solving: Balanced Strings 14) Algorithms Problem Solving: Number of students 15) Algorithms Problem Solving: Destination City 16) Algorithms Problem Solving: Maximum 69 Number 17) Algorithms Problem Solving: Shuffle the array 18) Algorithms Problem Solving: Insert into Binary Search Tree 19) Algorithms Problem Solving: Construct Binary Search Tree from Preorder Traversal 20) Algorithms Problem Solving: Odd in Matrix 21) Algorithms Problem Solving: Sort the Matrix Diagonally 22) Algorithms Problem Solving: Discount for prices 23) Algorithms Problem Solving: Running Array Sum

This post is part of the Algorithms Problem Solving series.

Problem Description

This is the Subtract Product and Sum problem. The description looks like this:

Given an integer number n, return the difference between the product of its digits and the sum of its digits.

Examples

Input: n = 234
Output: 15

Input: n = 4421
Output: 21

Solution

For each character, we transform it into an integer value, and then use as part of the multiplication and sum. At the top of the function scope, we define two variables: one for the multiplications and the other for the additions.

After the loop, we just need to return the subtraction between multiplications and additions.

def subtract_product_and_sum(num):
    multiplications = 1
    additions = 0

    for digit in str(num):
        multiplications *= int(digit)
        additions += int(digit)

    return multiplications - additions

Resources

Algorithms Problem Solving Series (23 Part Series)

1) Algorithms Problem Solving: Jewels and Stones 2) Algorithms Problem Solving: Ransom Note 3 ... 21 3) Algorithms Problem Solving: Sum of nodes 4) Algorithms Problem Solving: Subtract product and sum 5) Algorithms Problem Solving: Cloned Binary Tree 6) Algorithms Problem Solving: Group the people 7) Algorithms Problem Solving: Equal Reversed Arrays 8) Algorithms Problem Solving: Even Number of Digits 9) Algorithms Problem Solving: Reduce to zero 10) Algorithms Problem Solving: Deepest Leaves Sum 11) Algorithms Problem Solving: Tree to greater sum 12) Algorithms Problem Solving: to Lower case 13) Algorithms Problem Solving: Balanced Strings 14) Algorithms Problem Solving: Number of students 15) Algorithms Problem Solving: Destination City 16) Algorithms Problem Solving: Maximum 69 Number 17) Algorithms Problem Solving: Shuffle the array 18) Algorithms Problem Solving: Insert into Binary Search Tree 19) Algorithms Problem Solving: Construct Binary Search Tree from Preorder Traversal 20) Algorithms Problem Solving: Odd in Matrix 21) Algorithms Problem Solving: Sort the Matrix Diagonally 22) Algorithms Problem Solving: Discount for prices 23) Algorithms Problem Solving: Running Array Sum

Posted on Jun 1 by:

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TK

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