def main():
	n,a=map(int,input().split())
	y=[a-int(x) for x in input().split()]
	dp={0:1}
	for i in y:
		for k,v in list(dp.items()):
			dp[i+k]=dp.get(i+k,0)+v
	print(dp[0]-1)
if __name__=="__main__":
	main()