N,M=map(int,input().split())
dp = [False for _ in range(2**N)]
for _ in range(M):
    s = input()
    tmp = 0
    for j in range(N):
        if s[j]=="1":
            tmp += 2**(N-1-j)
    dp[tmp] = True
if dp[0]:
    print("No")
    exit()
for i in range(1,2**N):
    for j in range(N):
        if (1<<j)&i == 0:
            if (not dp[(1<<j)^i]) and (dp[i]):
                print("No")
                exit()
print("Yes")