def is_square(n):
  if n<0:
    return False
  a=int(n**0.5)
  for i in range(max(0,a-1),a+2):
    if i**2==n:
      return True
  return False

n=int(input())
ans=0
for i in range(1,n):
  if is_square(n**2-i**2):
    ans+=1
print(ans)