n, m, l = map(int, input().split())
a_list = list(map(int, input().split()))

current_colors = {l}
for a in a_list:
    next_colors = set()
    for c in current_colors:
        next_colors.add(c)  # don't mix
        mixed = (c + a) // 2
        next_colors.add(mixed)
    current_colors = next_colors

print("Yes" if m in current_colors else "No")