N, M = map(int, input().split())
s = [int(input(), 2) for _ in range(M)]
st = set(s)
ok = True
if 0 not in s or (1<<N)-1 not in s:
	ok = False
for s0 in s:
	for s1 in s:
		if s0 & s1 not in st:
			ok = False
for i in range(1 << M):
	now = (1<<N) - 1
	for j in range(M):
		if i&(1<<j):
			now |= s[j]
	if now not in st:
		ok = False
print("Yes" if ok else "No")