#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define rep2(i,l,r) for(int i=l;i<(int)r;i++)
#define all(v) v.begin(),v.end()

int main(){
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int N,M;
  cin>>N>>M;
  vector<int> A(M);
  int ok[1<<N];
  fill(ok,ok+(1<<N),0);
  rep(i,M){
    string S;
    cin>>S;
    rep(j,N)if(S[j]=='1')A[i]|=1<<j;
    ok[A[i]]=1;
  }
  if(!ok[(1<<N)-1]||!ok[0]){
    cout<<"No\n";
    return 0;
  }
  bool yes=1;
  rep(i,M){
    rep(j,M){
      if(!ok[A[i]&A[j]])yes=0;
      if(!ok[A[i]|A[j]])yes=0;
    }
  }
  cout<<(yes?"Yes\n":"No\n");
}