import math

firstInputText = input()
inputList = firstInputText.split()
a = int(inputList[0])
b = int(inputList[1])
c = int(inputList[2])
x = math.sqrt(a) + math.sqrt(b)
y = math.sqrt(c)
# print(x)
# print(y)

# if math.isclose(x,y):
#     print("Yes")
# else:
#     print("No")
if x == y:
    print("No")
elif x < y:
    print("Yes")
else:
    print("No")
