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

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`

``````class Solution {
public:
int subtractProductAndSum(int n) {
int prod = 1, sum = 0;
while (n > 0) {
int digit = n % 10;
prod *= digit;
sum += digit;
n /= 10;
}
return prod - sum;
}
};
``````

Github 同步地址:

https://github.com/grandyang/leetcode/issues/1281

https://leetcode.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer/

https://leetcode.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer/discuss/446372/JavaC%2B%2BPython-Straight-Forward-Solution

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