import sys
input = sys.stdin.readline

N,M=map(int,input().split())
S=[int(input().strip(),2) for i in range(M)]

SET=set(S)
if 0 in S and ((1<<N)-1) in S:
    pass
else:
    print("No")
    exit()

for i in range(M):
    for j in range(i+1,M):
        X=S[i]
        Y=S[j]

        Z=X&Y
        W=X|Y

        if Z in SET and W in SET:
            pass
        else:
            print("No")
            exit()

print("Yes")