# LeetCode 1281
###### tags: `python`,`LeetCode`
>這邊使用Python解題
## 題目：
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

## 我的解題思路：

trun n into a list type
k is lenth of list n
temp_1 = n[0] * n[1] * ... n[k-1]
temp_2 = n[0] + n[1] + ... n[k-1]
result = temp_1 - temp_2

## 程式碼（使用Python）:

def subtractProductAndSum(n: int):
    listN = [int(x) for x in str(n)]
    temp1 = 1
    temp2 = 0

    for idx in listN:
        temp1 = temp1 * idx
        temp2 = temp2 + idx
    return temp1 - temp2