N,M,L = map(int,input().split())
A = list(map(int,input().split()))
if L == M:
    print("Yes")
    exit()
now = set([L])
for i in range(N):
    new = set()
    for j in now:
        new.add(j)
        new.add((j+A[i])//2)
    if M in new:
        print("Yes")
        exit()
    now = new
print("No")