There are N positive integers written on a blackboard: A_1, ..., A_N.  Snuke can perform the following operation when all integers on the blackboard are even:    * Replace each integer X on the blackboard by X divided by 2.  Find the maximum possible number of operations that Snuke can perform.
print(input().count("1"))
N = input()
A = list(map(int, input().split()))
count = 0
while all(a%2==0 for a in A):
    A = [a/2 for a in A]
    count += 1
print(count)