Li Kou daily question - day 30 -1281 Difference of sum of bit product of integer

2022.6.28 Did you brush the questions today ？

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subject ：

Give you an integer  n, Please help calculate and return the integer 「 The product of your numbers 」 And 「 The sum of your numbers 」 Difference .

analysis ：

Given an integer , Complete the multiplication of the product of each bit , And yours , Then use the product - and . for example

123

product ：1*2*3=6

and ：1+2+3=6

result = product - and =6-6=0

analysis ：

class Solution {
public:
    int subtractProductAndSum(int n) {
        int mul = 1;
        int sum = 0;
        while (n != 0)
        {
            mul *= n % 10;
            sum += n % 10;
            n /= 10;
        }
        return mul - sum;
    }
};