N,M,L=map(int, input().split())
A=list(map(int, input().split()))
D={}
D[L]=1
from collections import deque
d=deque()
d.append(L)
for i in range(N):
  nd=deque()
  DD={}
  while d:
    now=d.popleft()
    nex=(now+A[i])//2 
    if nex not in D:
      D[nex]=1
    if nex not in DD:
      DD[nex]=1
      nd.append(nex)
    if now not in DD:
      DD[now]=1
      nd.append(now)
  d=nd
if M in D:
  print('Yes')
else:
  print('No')