27. Remove_Element.py

# Given an integer array nums and an integer val, remove all occurrences of val in nums in-place.
# The order of the elements may be changed. Then return the number of elements in nums which are not equal to val.

# Consider the number of elements in nums which are not equal to val be k, to get accepted, you need to do the following things:

# Change the array nums such that the first k elements of nums contain the elements which are not equal to val. 
# The remaining elements of nums are not important as well as the size of nums.
# Return k.



# ---------Solution--------->
# class Solution:
#     def removeElement(self, nums: List[int], val: int) -> int:
#         i = 0
#         j = 0

#         while i < len(nums):
#             if nums[i] != val:
#                 nums[j] = nums[i]
#                 j += 1
#             i += 1    
#         return j