N = int(input())
A = list(map(int, input().split()))

lower = -1000
upper = 1000

for i in range(N):
  if lower > A[i] or upper < A[i]: # 条件を修正
    continue
  less = 0
  more = 0
  for j in range(N):
    if A[i] > A[j]:
      less += 1
    elif A[i] < A[j]:
      more += 1
  if less < N / 2 and more < N / 2:
    lower = A[i]
    upper = A[i]
    break
  elif less >= N / 2: #
    upper = A[i]
  else:
    lower = A[i]

print((lower + upper) / 2 )