from math import gcd
l = int(input()) // 4

lst = []
m = 2
ans = 0
while 1:
    if 2 * m * (m + 1) >= l:
        break
    n = 1
    while n < m and 2 * m * (m + n) <= l:
        a, b, c = m * m - n * n, 2 * m * n, m * m + n * n
        if gcd(gcd(a, b), c) == 1:
            ans += 1
        n += 1
    m += 1
print(ans)