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

You are given an array nums consisting of positive integers.
You have to take each integer in the array, reverse its digits, and add it to the end of the array. You should apply this operation to the original integers in nums.
Return the number of distinct integers in the final array.
 
Please complete the following python code precisely:
```python
class Solution:
    def countDistinctIntegers(self, nums: List[int]) -> int:
```