from math import sqrt

i = input().split()
a = int(i[0] * 1000000000000000000000000)
b = int(i[1]* 1000000000000000000000000)
c = int(i[2]* 1000000000000000000000000)

if sqrt(a) + sqrt(b) < sqrt(c):
    print("Yes")
else:
    print("No")