Please solve the programming task below using a self-contained code snippet in a markdown code block.

Given an integer array nums and two integers k and p, return the number of distinct subarrays, which have at most k elements that are divisible by p.
Two arrays nums1 and nums2 are said to be distinct if:

They are of different lengths, or
There exists at least one index i where nums1[i] != nums2[i].

A subarray is defined as a non-empty contiguous sequence of elements in an array.
 
Please complete the following python code precisely:
```python
class Solution:
    def countDistinct(self, nums: List[int], k: int, p: int) -> int:
```