#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
  int n, m;
  cin >> n >> m;
  vector<int> check(1 << n);
  for (int i = 0; i < m; ++i)
  {
    string s;
    cin >> s;
    int id = 0;
    for (auto c : s) id = id * 2 + c - '0';
    check[id] = 1;
  }
  if (check[0])
  {
    cout << "No" << endl;
    return 0;
  }
  for (int i = 0; i < (1 << n); ++i)
  {
    if (!check[i]) continue;
    int ans = 1;
    for (int j = 0; j < n; ++j)
    {
      if (!(i & (1 << j)))
      {
        ans &= check[(i ^ (1 << j))];
      }
    }
    if (ans == 0)
    {
      cout << "No" << endl;
      return 0;
    }
  }
  cout << "Yes" << endl;
}