N, M, L = map(int, input().split())
A = list(map(int, input().split()))

cset = {L}
for a in A:
    cset2 = set()
    for c in cset:
        cset2.add((a + c) // 2)
    cset |= cset2
if M in cset:
    print("Yes")
else:
    print("No")