output_description: Print the maximum number of operations that Snuke can perform.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
      a_1 a_2 a_3 ... a_N
attempt: class Solver(object):
      def __init__(self):
          self.n = int(input())
          self.a_s = list(map(int, input().split(" ")))
          self._evens = None
  
      def solve_archive(self):
          if len(self.evens) == 0:
              return 0
          number = min(self.evens)
  
      def solve(self):
          print(sum(map(Solver.count_multiple_of_two, self.a_s)))
  
      @staticmethod
      def count_multiple_of_two(number):
          counter = 0
          while number % 2 == 0:
              number /= 2
              counter += 1
          return counter
  
      @property
      def evens(self):
          if self._evens is None:
              self._evens = []
              for a in self.a_s:
                  if a % 2 == 0:
                      self._evens.append(a)
          return self._evens
  
  
  if __name__ == "__main__":
      s = Solver()
      s.solve()
  
problem_description: Statement
  
  As AtCoder Beginner Contest 100 is taking place, the office of AtCoder, Inc.
  is decorated with a sequence of length N, a = {a_1, a_2, a_3, ..., a_N}.  
  Snuke, an employee, would like to play with this sequence.
  
  Specifically, he would like to repeat the following operation as many times as
  possible:
  
      
      
      For every i satisfying 1 \leq i \leq N, perform one of the following: "divide a_i by 2" and "multiply a_i by 3".  
      Here, choosing "multiply a_i by 3" for every i is not allowed, and the value of a_i after the operation must be an integer.
      
  
  At most how many operations can be performed?
samples: [{"input": "3\n    5 2 4", "output": "3\n    \n\nThe sequence is initially {5, 2, 4}. Three operations can be performed as\nfollows:\n\n  * First, multiply a_1 by 3, multiply a_2 by 3 and divide a_3 by 2. The sequence is now {15, 6, 2}.\n  * Next, multiply a_1 by 3, divide a_2 by 2 and multiply a_3 by 3. The sequence is now {45, 3, 6}.\n  * Finally, multiply a_1 by 3, multiply a_2 by 3 and divide a_3 by 2. The sequence is now {135, 9, 3}.\n\n* * *"}, {"input": "4\n    631 577 243 199", "output": "0\n    \n\nNo operation can be performed since all the elements are odd. Thus, the answer\nis 0.\n\n* * *"}, {"input": "10\n    2184 2126 1721 1800 1024 2528 3360 1945 1280 1776", "output": "39"}]