n, m, l = map(int, input().split())
dp = [False] * 1000
dp[l - 1] = True
for a in map(int, input().split()):
    a -= 1
    ndp = dp[:]
    for i in range(1000):
        if dp[i]:
            ndp[(i + a) // 2] = True
    dp = ndp
print('Yes' if dp[m - 1] else 'No')