#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

bool seen[1 << 16];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  VI a(m);
  rep(i, m) {
    string s;
    cin >> s;
    int x = 0;
    rep(i, n) x |= (s[i] - '0') << i;
    seen[x] = true;
    a[i] = x;
  }
  bool ans = [&]() {
    if (!seen[0] || !seen[(1 << n) - 1]) return false;
    rep(i, m) rep(j, i) {
      int x = a[i], y = a[j];
      if (!seen[x | y] || !seen[x & y]) {
        return false;
      }
    }
    return true;
  }();
  cout << (ans ? "Yes\n" : "No\n");
}