import math
a, b, c = map(int, input().split())
a_sqrt = math.sqrt(a)
b_sqrt = math.sqrt(b)
c_sqrt = math.sqrt(c)

a_sqrt = round(a_sqrt,-13)
b_sqrt = round(b_sqrt,-13)
c_sqrt = round(c_sqrt,-13)

if (a_sqrt+b_sqrt) < c_sqrt:
	print('Yes')
else:
	print('No')