import sys
sys.set_int_max_str_digits(0)
import math

sq5 = math.sqrt(5)

P = 1000000000000002097
fio = [0, 1]
for i in range(50):
    fio.append((fio[-1] + fio[-2]) % P)

def mul(m1, m2):
    m3 = [
        [(m1[0][0] * m2[0][0] + m1[0][1] * m2[1][0]) % P, (m1[0][0] * m2[0][1] + m1[0][1] * m2[1][1]) % P],
        [(m1[1][0] * m2[0][0] + m1[1][1] * m2[1][0]) % P, (m1[1][0] * m2[0][1] + m1[1][1] * m2[1][1]) % P]
    ]
    return m3

def Fio(n):
    if n <= 20:
        return fio[n]
    y = [[1, 0], [0, 1]]
    x = [[0, 1], [1, 1]]
    while n > 0:
        if n % 2 == 1:
            y = mul(y, x)
        x = mul(x, x)
        n //= 2
    return y[0][0]

def get(x):
    if x <= 20:
        y = 1
        while True:
            if fio[y] >= x:
                return y
            y += 1
    return math.ceil((math.log10(sq5) + math.log10(x)) / math.log10((1 + sq5) / 2))

n = int(input())
a = [int(input()) for _ in range(n)]
a = sorted(a)

ans = 0
mp = {-1:0}

for j in range(0, n):
    i = get(a[j])
    a[j] %= P
    ans += mp.get((Fio(i) - a[j] + P) % P, 0)
    ans += mp.get((Fio(i + 1) - a[j] + P) % P, 0)
    ans += mp.get((Fio(i + 2) - a[j] + P) % P, 0)
    ans += mp.get((Fio(i + 3) - a[j] + P) % P, 0)

    if mp.get(a[j], 0) == 0:
        mp.update({a[j]:1})
    else:
        mp[a[j]] += 1


print(ans)