n = int(input())
a = list(map(int, input().split())) 

ans = 0
flag = True

while(flag):
  for i in range(len(a)):
    if (a[i] % 2 != 0):
      flag = False
    else:
      a[i] = a[i] // 2
  if not (flag):
    break
  ans += 1

print(ans)