/*
TASK:matrix
LANG:C++
*/
#include<iostream.h>
long int a[100][100];
int main ()
{
int n,m,i,j,sub=0,br,sub1=0;
cin >> n>>m;
br=n;
for (i=0;i<n+1;i++)
for (j=1;j<m;j++) cin >>a[i][j];
for (j=1;j<m;j++) sub1+=a[1][j];
for (i=1;i<n;i++) { for ( j=1;j<m;j++) { sub*=a[i][j];}
			if ( sub1==sub ) br--;
			sub1=sub;
			}
cout<<br+1;
cout<<endl;
return 0;
}