import sys
input = sys.stdin.readline

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

for i in range(N):
    X1=(1<<N)-1
    X2=0

    for s in S:
        if s & (1<<i) != 0:
            X1&=s
        else:
            X2|=s

    flag=1

    #print(i,X1,X2)

    for j in range(N):
        if i==j:
            continue
        if (X1 & (1<<j) == 0 )or (X2 & (1<<j) != 0 ):
            True
        else:
            flag=0

    if flag==0:
        print("No")
        break
else:
    print("Yes")