import math
import decimal
decimal.getcontext().prec = 6
a, b, c = map(int, input().split())
a = decimal.Decimal(a)
b = decimal.Decimal(b)
c = decimal.Decimal(c)
d = decimal.Decimal(math.sqrt(a*b))
if a + 2 * d +b - c < 1e-20:
    print("Yes")
else:
    print("No")