n,m,l=map(int,input().split())
q=[0]*1001
q[l]=1
for c in list(map(int,input().split())):
	nq=[0]*1001
	for i in range(1001):
		nq[i]|=q[i]
		nq[(i+c)//2]|=q[i]
	q=nq
print(["No","Yes"][q[m]])