R=range
I=lambda:int(input())
f=I()
b=I()
c=I()
t=1
g=b+c-f-1
for d in R(1,g):
	for e in R(1,g-d+1):
		a=d+f+e
		s=a+b+c
		S=s*(s-2*a)*(s-2*b)*(s-2*c)
		i=4*a*a*b*b-S
		j=4*a*a*c*c-S
		assert(i>0 and j>0)
		l,r=0,i+1
		while l<r-1:
			k=(l+r)//2
			if k*k>i:r=k
			else:l=k
		k=l
		l,r=0,j+1
		while l<r-1:
			n=(l+r)//2
			if n*n>j:r=n
			else:l=n
		n=l
		if k*k==i and n*n==j and 2*a*(b*b*e-c*c*d)==(k-n)*d*e:t=0
print("YNeos"[t::2])