def toint(s):
	neg = s[0] == "-"
	if neg: s = s[1:]
	res = 0
	d = 4
	for i in reversed(range((len(s) + d - 1) // d)):
		block = s[-d*(i+1):-d*(i)]
		if i == 0: block = s[-d*(i+1):]
		res *= 10 ** d
		res += int(block)
	if neg:
	  return -res
	else:
		return res

a, p, q = [toint(x) for x in input().split()]
b = -a * (p + q)
c = a * p * q
ok = b ** 2 > 4 * a * c
print("Yes" if ok else "No")