#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N=1e6+5;
int n,k,ans,p,d[N]; bool bl,fx[N];
set <int> s;
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	cin>>n>>k; int a[n+5][k+5],b[n+5][k+5];
	for (int i=1; i<=n; i++)
		for (int j=1; j<=k; j++){
			cin>>a[i][j];
		}
	for (int i=1; i<=n; i++)
		for (int j=1; j<=k; j++){
			cin>>b[i][j];
		}
	while (1){
		p=0;
		for (int i=1; i<=n; i++){
			if (fx[i]) continue; bl=0;
			for (int j=1; j<=k; j++){
				if (a[i][j]>0) bl=1;
			}
			if (bl==0){
				p++; fx[i]=1;
				for (int j=1; j<=k; j++){
					d[j]+=b[i][j];
				} 
			}
		}
		if (p==0) break; ans+=p;
		for (int j=1; j<=k; j++){
			for (int i=1; i<=n; i++){
				a[i][j]-=d[j];
			}
			d[j]=0;
		}
	}
	cout<<ans;
}