import sys
input = sys.stdin.readline
N, M = map(int, input().split())
S = [input().strip() for _ in range(M)]
T = set(S)
if "1"*N not in T:
    print("No")
    exit()
for i in range(N):
    for j in range(i+1, N):
        si = S[i]
        sj = S[j]
        tmp = ""
        for k in range(N):
            if si[k]=="1" and sj[k]=="1":
                tmp+="1"
            else:
                tmp+="0"
        if tmp not in T:
            print("No")
            exit()
dp = [0 for _ in range(N)]
for s in S:
    for i in range(N):
        if s[i]=="1":
            dp[i] = 1
if "0"*N not in T:
    print("No")
    exit()
dp.reverse()
tmp = "".join(map(str, dp))
if tmp not in T:
    print("No")
    exit()
print("Yes")