N,M=map(int, input().split())
c=-1;ans='Yes'
S=set()
for i in range(M):
  s=int(input(),2)
  S.add(s)
  if s==0:
    ans='No'
  if c==-1:
    c=s 
  else:
    c&=s 

if c not in S:
  ans='No'

s=N-bin(c)[2:].count('1')
if M!=pow(2,s):
  ans='No'
print(ans)