import numpy as np

def hantei(R):
    return np.sqrt(R)==int(np.sqrt(R))

X,Y =map(int,input().split())
l =[0]*(Y-X+1)
for i in range(int(np.sqrt(Y))+1):
    for j in range(i+1):
        if X <= i**2 +j**2 <= Y:
            l[i**2 +j**2-X] +=8
for i in range(X,Y+1):
    if hantei(i) or hantei(i/2):
        l[i-X] -= 4
print(max(l))