from collections import defaultdict
ans = 0
n = int(input())
d = defaultdict(int)
l = [0] * n
for i in range(1,n):
    d[i**2] += 1
    l[i] = i ** 2
ans = 0
for i in range(1,n):
    find = n ** 2 - l[i]
    if find in d:
        ans += 1
print(ans)