n,g,s=map(int,input().split())
a=list(map(int,input().split()))
C=1000
q=[0]*(C+1)
q[s]=1
for v in a:
	nq=[0]*(C+1)
	for i in range(C+1):
		if q[i]:
			nq[i]=1
			nq[(i+v)//2]=1
	q=nq
print(["No","Yes"][q[g]])