#include<bits/stdc++.h>
using namespace std;
int m,n;
int a[1010][1010];
int ask[1010];
int x,y,ans;
int c;
int main()
{
	//freopen("kingdom.in","r",stdin);
	//freopen("kingdom.out","w",stdout); 
	cin>>n>>m;
	for(int i=1;i<=m;i++)
	{
	  for(int j=1;j<=n;j++)
	  {
	 	cin>>a[i][j];
	  }
	}
	for(int i=1;i<=n;i++) cin>>ask[i];
	for(int i=1;i<=m;i++)
	{
        for(int j=1;j<=n;j++)
		{
            if(a[j][i]==1) x++;
            else  y++;
        }
        int c;
        if(x>y) c=1;
        else c=0;
        if(ask[i]==c) ans++;
    }

	 cout<<ans<<endl;
	return 0;
 }