import sys
from math import sqrt
from collections import Counter

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 18
MOD = 10 ** 9 + 7
EPS = 10 ** -10

lo, hi = MAP()

N = int(sqrt(hi)) + 1
C = Counter()
for i in range(-N, N):
    for j in range(-N, N):
        r = i*i + j*j
        if lo <= r <= hi:
            C[r] += 1
C = C.most_common()
if C:
    ans = C[0][1]
    print(ans)
else:
    print(0)