1281. Subtract the Product and Sum of Digits of an Integer*
https://leetcode.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer/
题目描述
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
C++ 实现 1
class Solution {
public:
int subtractProductAndSum(int n) {
int sum = 0, prod = 1;
while (n) {
sum += n % 10;
prod *= n % 10;
n /= 10;
}
return prod - sum;
}
};