import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
nn=int(n**0.5)+1
A=set()
def gcd(a,b):
  while b:
    a,b=b,a%b
  return a
for i in range(1,nn):
	for j in range(i+1,nn):
		if 8*j*(i+j)<=n:
			a,b=j**2-i**2,2*i*j
			if a>b:
				a,b=b,a
			a,b=a//gcd(a,b),b//gcd(a,b)
			A.add(a*10**8+b)
print(len(A))