import sys, os, math, bisect, itertools, collections, heapq, queue

# from scipy.sparse.csgraph import csgraph_from_dense, floyd_warshall

from decimal import Decimal

from collections import defaultdict, deque



# import fractions



sys.setrecursionlimit(10000000)



ii = lambda: int(sys.stdin.buffer.readline().rstrip())

il = lambda: list(map(int, sys.stdin.buffer.readline().split()))

fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))

iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]



iss = lambda: sys.stdin.buffer.readline().decode().rstrip()

sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))

isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]



lcm = lambda x, y: (x * y) // math.gcd(x, y)

# lcm = lambda x, y: (x * y) // fractions.gcd(x, y)



MOD = 10 ** 9 + 7

MAX = float('inf')





def main():

    if os.getenv("LOCAL"):

        sys.stdin = open("input.txt", "r")



    N = ii()

    A = il()

    ret = 0

    for n in range(N):

        while A[n] % 2 == 0:

            A[n] //= 2

            ret += 1

    print(ret)





if __name__ == '__main__':

    main()

import sys, os, math, bisect, itertools, collections, heapq, queue

# from scipy.sparse.csgraph import csgraph_from_dense, floyd_warshall

from decimal import Decimal

from collections import defaultdict, deque



sys.setrecursionlimit(10000000)



ii = lambda: int(sys.stdin.buffer.readline().rstrip())

il = lambda: list(map(int, sys.stdin.buffer.readline().split()))

fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))

iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]



iss = lambda: sys.stdin.buffer.readline().decode().rstrip()

sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))

isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]



lcm = lambda x, y: (x * y) // math.gcd(x, y)



MOD = 10 ** 9 + 7

MAX = float('inf')





def main():

    if os.getenv("LOCAL"):

        sys.stdin = open("input.txt", "r")



    N = ii()

    A = il()

    ret = 0

    for a in A:

        while a % 2 == 0:

            a //= 2

            ret += 1

    print(ret)









if __name__ == '__main__':

    main()

import sys, os, math, bisect, itertools, collections, heapq, queue

# from scipy.sparse.csgraph import csgraph_from_dense, floyd_warshall
from decimal import Decimal
from collections import defaultdict, deque

# import fractions
sys.setrecursionlimit(10000000)
ii = lambda: int(sys.stdin.buffer.readline().rstrip())
il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]
iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]
lcm = lambda x, y: (x * y) // math.gcd(x, y)
# lcm = lambda x, y: (x * y) // fractions.gcd(x, y)
MOD = 10**9 + 7
MAX = float("inf")


def main():
    if os.getenv("LOCAL"):
        sys.stdin = open("input.txt", "r")
    N = ii()
    A = il()
    ret = 0
    for n in range(N):
        while A[n] % 2 == 0:
            A[n] //= 2
            ret += 1
    print(ret)


if __name__ == "__main__":
    main()

import sys, os, math, bisect, itertools, collections, heapq, queue

# from scipy.sparse.csgraph import csgraph_from_dense, floyd_warshall
from decimal import Decimal
from collections import defaultdict, deque

sys.setrecursionlimit(10000000)
ii = lambda: int(sys.stdin.buffer.readline().rstrip())
il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]
iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]
lcm = lambda x, y: (x * y) // math.gcd(x, y)
MOD = 10**9 + 7
MAX = float("inf")


def main():
    if os.getenv("LOCAL"):
        sys.stdin = open("input.txt", "r")
    N = ii()
    A = il()
    ret = 0
    for a in A:
        while a % 2 == 0:
            a //= 2
            ret += 1
    print(ret)


if __name__ == "__main__":
    main()

-# import fractions -# lcm = lambda x, y: (x * y) // fractions.gcd(x, y) -    for n in range(N): -        while A[n] % 2 == 0: -            A[n] //= 2 +    for a in A: +        while a % 2 == 0: +            a //= 2