def var_calc(n):
	var = 0
	for i in range(1, n + 1):
		var += i * i
	return var

def shirabe(n):
	var = 0
	for i in range(1, n + 1):
		var += i * i
	a = [0] * (var + 1)
	a[0] = 1
	for i in range(1, n + 1):
		b = a[::]
		for j in range(var + 1):
			if i * i + j <= var and a[j]:
				b[i * i + j] = 1
		a = b
	tar = []
	for i in range(var + 1):
		if a[i] == 0:
			tar.append(i)
	return tar

	
# 1 + 4 + 9 + 16 + 25 + 36


#for n in range(1, 11):
#	print(n, shirabe(n), var_calc(n))

umekomi = [2, 3, 6, 7, 8, 11, 12, 15, 18, 19, 22, 23, 24, 27, 28, 31, 32, 33, 43, 44, 47, 48, 60, 67,
72, 76, 92, 96, 108, 112, 128]

r, b = map(int,input().split())

ub = 2 * 10 ** 6
lb = 1
while ub - lb > 1:
	t = (ub + lb) // 2
	av = var_calc(t)
	if r + b < av:
		ub = t
		continue
	norep = set(umekomi)
	for i in umekomi:
		norep.add(av - i)
	if r >= av or b >= av:
		lb = t
		continue
	good = 0
	for i in range(0, min(r+1, 1000)):
		if r - i in norep: continue
		if av - (r - i) > b: continue
		if av - (r - i) < 0: continue
		if av - (r - i) in norep: continue
		good = 1
		break
	if good:
		lb = t
	else:
		ub = t

print(lb)