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Count the Digits That Divide a Number
Given an integer num, return the number of digits in num that divide num.
Given an integer num, return the number of digits in num that divide num.
An integer val divides nums if nums % val == 0.
Example 1
Input: num = 7
Output: 1
Explanation: 7 divides itself, hence the answer is 1.
Example 2
Input: num = 121
Output: 2
Explanation: 121 is divisible by 1, but not 2. Since 1 occurs twice as a digit, we return 2.
Example 3
Input: num = 1248
Output: 4
Explanation: 1248 is divisible by all of its digits, hence the answer is 4.
Constraints
- 1 <= num <= 10^9
- num does not contain 0 as one of its digits.
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