#!/usr/bin/env python3
import sys

def main():
    N = int(input())
    s = set()
    for i in range(1, 2 * 10 ** 5 + 1):
        s.add(i ** 2)
    ans = 0
    for x in s:
        if N ** 2 - x in s:
            ans += 1
    print(ans)

if __name__ == '__main__':
    main()