#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
// const ll INF = numeric_limits<ll>::max() / 4;
// const int INF = numeric_limits<int>::max() / 4;
// cout << std::fixed << std::setprecision(15);

int main() {
	int N, M;
	cin >> N >> M;
	if(N == 1){
		cout << "Yes" << endl;
		return 0;
	}
	vector<string> S(M);
	for(int i = 0; i < M; i++) cin >> S[i];
	int D = 64;
	int K = ((N - 1) / D) + 1;
	vector X(M, vector<ull>(K, 0));
	for(int i = 0; i < M; i++){
		for(int k = 0; k < K; k++){
			for(int b = 0; b < min(N - k * D, D); b++){
				if(S[i][k * D + b] == '1') X[i][k] += (1ULL << b);
			}
		}
	}
	vector<ull> msk(K, 0);
	for(int j = 0; j < N; j++) msk[j / D] |= (1ULL << (j % D));

	bool h = true;
	for(int j = 0; j < N; j++){
		vector<ull> b = msk;
		b[j / D] ^= (1ULL << (j % D));
		for(int i = 0; i < M; i++){
			vector<ull> a = X[i];
			bool f = (0 == (a[j / D] & (1ULL << (j % D))));
			for(int k = 0; k < K; k++){
				if(f) a[k] = (~a[k]);
				b[k] &= a[k];
			}
		}
		bool g = true;
		for(int k = 0; k < K; k++) if(b[k] != 0) g = false;
		if(!g){
			h = false;
			break;
		}
	}

	if(h){
		cout << "Yes" << endl;
	}else{
		cout << "No" << endl;
	}
	return 0;
}