#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
  //1.入力の受け取り.
  bool ans = true;
  int N,M;
  cin>>N>>M;
  vector<int> A(M);
  set<int> B; //3.の存在判定のときに使用
  for(int i = 0; i < M; i++){
  	string S; cin>>S;
  	int now = 0;
  	for(int j = 0; j < N; j++){
  		now += (S[N-j-1] - '0') * (1<<j);
  		B.insert(now);
  	}
  	A[i] = now;
  }
  
  //2.条件1を満たすかの確認
  for(int i = 0; i < M; i++){
  	if(A[i] == 0){
  		ans = false;
  	}
  }
  
  //3.条件2を満たすかの確認
  int one = 0; //4.で使用する変数
  vector<int> cnt(1<<N);
  
  for(int i = 0; i < M; i++){
  	cnt[A[i]]++;
  	if(cnt[A[i]] == 1) one++;
  	if(cnt[A[i]] == 2) one--;
  	for(int j = 0; j < N; j++){
  		if(A[i] & (1<<j)) continue;
  		if(!B.count(A[i] | (1<<j))){
  			ans = false;
  		}
  		cnt[A[i] | (1<<j)]++;
  		if(cnt[A[i] | (1<<j)] == 1) one++;
  		if(cnt[A[i] | (1<<j)] == 2) one--;
  	}
  }
  
  //4.条件3を満たすかの確認
  if(one >= 2) ans = false;
  
  //5.出力
  if(ans) cout << "Yes" << "\n";
  else cout << "No" << "\n";
}