S = set()
N = int(input())

for i in range(1,N+1):
    S.add(i**2)
ans = 0
for i in range(1,N+1):
    if N**2 - i**2 in S:
        ans += 1
        #print(i)
if N%2== 0 and (N**2)//2 in S:
    ans -= 1
print(ans)