s = [input() for i in range(2)]
N = int(s[0])
A = s[1].split()

for i in range(N):
    for j in range(i, N):    
        if int(A[i]) > int(A[j]):
            tmp = A[i]
            A[i] = A[j]
            A[j] = tmp

result = int(A[N // 2]) if N % 2 == 1 else (int(A[N // 2 - 1]) + int(A[N // 2])) / 2
print(result)