a=int(input())
b=int(input())
c=int(input())
f=1
for i in range(1,b+c-a):
  for j in range(1,b+c-a-i):
    f=min(f,(i*(a+i)*c*c==b*b*j*(a+j) and abs(b-c)<i+j+a)^1)
print("YNeos"[f::2])