comefrom: <doocs>0027.Remove Element_1.py
code: def removeElement( nums: List[int], val: int) -> int:
      cnt, n = 0, len(nums)
      for i in range(n):
          if nums[i] == val:
              cnt += 1
          else:
              nums[i - cnt] = nums[i]
      return n - cnt
masked: def sample_funcname ( var_0 : List [ int ] , var_3 : int ) -> int :
      var_5 , var_7 = 0 , len ( var_0 )
      for var_9 in range ( var_7 ) :
          if var_0 [ var_9 ] == var_3 :
              var_5 += 1
          else :
              var_0 [ var_9 - var_5 ] = var_0 [ var_9 ]
      return var_7 - var_5
  