E27. Remove Element

#optimized: memory concept in this question is nice
class Solution:
    def removeElement(self, nums: List[int], val: int) -> int:
        c = 0
        for i in range(len(nums)):
            if nums[i]==val:
                nums[i]=51
                c = c+1
        nums.sort()
        for j in range(c):
            nums.pop()