26.remove-duplicates-from-sorted-array.py

class Solution:
    def removeDuplicates(self, nums: List[int]) -> int:
        i, j = 0, 0
        n = len(nums)

        while i < n:
            if nums[i] != nums[j]:
                j += 1
                nums[j] = nums[i]

            i += 1
        
        return j + 1