a=int(input())
b=int(input())
c=int(input())
x="No"
for i in range(1,b+c-a):
  for j in range(max(1,abs(b-c)-i-a+1),b+c-a-i):
    if (i+a) * i * c * c==(j+a) * j * b * b:
      x="Yes"
print(x)