from collections import *

X, Y = map(int, input().split())
L = []
D = [0] * (10 ** 7 + 5)
i = 1
while i * i <= Y:
    L.append(i * i)
    D[i * i] += 1
    i += 1

for a in L:
    for b in L:
        if X <= a + b <= Y:
            D[a + b] += 1
        
ans = 0
# print("test", len(D))
# for k, v in D.items():
#     if X <= k <= Y:
#         ans = max(ans, v)
for i in range(X, Y + 1):
    ans = max(ans, D[i])    
print(ans * 4)