R=range
f,a,b=map(int,input().split())
y=0
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
		l,r=0,i+1
		while i<r+1:
			k=(l+r)//2
			if k*k>i:r=k
			else:l=k
		l,r=0,j+1
		while i<r+1:
			n=(l+r)//2
			if n*n>i:r=n
			else:l=n
		if k*k==i and l*l==j and 2*a*(b*b*e-c*c*d)==(k-l)*d*e:y=1
print("YNeos"[y::2])