n = int(input())
import math
res = 0
eps = 0.0000001
for i in range(1,n):
    #print(math.sqrt(n**2 - i**2))
    if abs(math.sqrt(n**2 - i**2) - math.floor(math.sqrt(n**2 - i**2))) < eps:
        res += 1
print(res)