26(2)

data = open("26.txt").readlines()
n = int(data[0])
a = list(map(int, data[1:]))
cnt = 0
mx = 0
st = set(a)
for i in range(n):
    for j in range(i + 1, n):
        if (a[i] % 2 == 0) or (a[j] % 2 == 0): #если пара не подходит
            continue
        x = (a[i] + a[j]) // 2
        if x in st:
            cnt += 1
            mx = max(mx, x)
print(cnt, mx)