#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define ordered_set <int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
#define ordered_multiset <int, null_type, less_equal <int>, rb_tree_tag, tree_order_statistics_node_update>
#define int long long
#define pvv pair <vector <int>, vector <int>>
#define double long double
#define pii pair <int, int>
#define tiii tuple <int, int, int>
#define tiiii tuple <int, int, int, int>
#define emb emplace_back
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define iShowSpeed cin.tie(NULL)->sync_with_stdio(false)
#define matrix vector <vector <int>>
#define mat(n, m) vector <vector <int>> (n, vector <int> (m));
const int mod = 1e9 + 7;
const int inf = 1e18;
const matrix II = {{1, 0}, {0, 1}};
priority_queue <pii, vector <pii>, greater <pii>> q[1000005];
int32_t main(){
iShowSpeed;
int n, k; cin >> n >> k;
int u[n + 1][k + 1], r[n + 1][k + 1];
memset(u, 0, sizeof u);
memset(r, 0, sizeof r);
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= k; j++) {
cin >> u[i][j];
q[j].emplace(u[i][j], i);
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= k; j++) {
cin >> r[i][j];
}
}
vector <int> cnt(n + 1), p(n + 1);
while (1) {
bool fix = false;
for (int i = 1; i <= k; i++) {
while (!q[i].empty()) {
if (p[i] >= q[i].top().first) {
cnt[q[i].top().second]++;
if (cnt[q[i].top().second] == k) {
for (int j = 1; j <= k; j++) {
p[j] += r[q[i].top().second][j];
}
}
q[i].pop();
fix = true;
}
else break;
}
}
if (!fix) break;
}
cout << count(all(cnt), k);
}
