import itertools as iter
import collections as coll
import heapq as hq
import bisect as bis
from decimal import Decimal as dec
from functools import cmp_to_key
import math
import sys
#import pypyjit
#pypyjit.set_param('max_unroll_recursion=-1')
sys.setrecursionlimit(10 ** 6)
inp = sys.stdin.readline
input = lambda : inp().rstrip()
getN = lambda : int(inp())
getNs = lambda : map(int, inp().split())
getList = lambda :list(map(int, inp().split()))
getStrs = lambda n : [input() for _ in [0] * n]
def yexit(): print("Yes"); exit(0)
def nexit(): print("No"); exit(0)
pi = 3.141592653589793
mod = 1000000007
MOD = 998244353
INF = 4611686018427387903
dx = [1, 0, -1, 0];	dy = [0, 1, 0, -1]
#di = coll.defaultdict(int)


"""
Main Code
"""

n = getN()
m = getN()
s = getStrs(m)
st = set([])

for ss in s:
	t = 0
	for i, c in enumerate(ss[::-1]):
		t |= int(c) << i
	st.add(t)

for i in range(n):
	a = (1 << n) - 1
	b = 0
	for k in st:
		if((k >> i) & 1):
			a &= k
		else:
			b |= k
	for j in range(n):
		if(i == j):
			continue
		if((a >> j) & 1 and ((b >> j) & 1) == 0):
			nexit()
yexit()