#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int n,m;cin>>n>>m;
  bool ans=true;
  int b=1<<n;
  vc<bool>v(b,0);
  vc<int>x;
  rep(i,m){
    sr s;cin>>s;
    int a=0;
    rep(j,n)if(s[n-j-1]=='1')a^=1<<j;
    v[a]=1;
    x.pb(a);
  }
  if(!v.back())ans=0;
  rep(i,m)rep(j,i)if(!v[x[i]&x[j]])ans=0;
  vc<int>g(b,0);
  rep(i,b)if(v[i])g[i]=i;
  rep(i,n)rep(j,b)if(~j>>i&1)g[j^1<<i]|=g[j];
  rep(i,b)if(g[i]==i&&!v[i])ans=0;
  if(ans)cout<<"Yes";
  else cout<<"No";
  
}