import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	X, Y = getlist()
	L = [0] * (5 * 10 ** 7)
	for i in range(-(4 * 10 ** 3), 4 * 10 ** 3):
		for j in range(-(4 * 10 ** 3), 4 * 10 ** 3):
			L[i ** 2 + j ** 2] += 1

	ans = 0
	for i in range(X, Y + 1):
		ans = max(ans, L[i])

	print(ans)
	
if __name__ == '__main__':
	main()