// Source: https://usaco.guide/general/io #include <bits/stdc++.h> using namespace std; using ll = long long; bool comp(pair<ll,ll> a, pair<ll,ll> b){ ll r1 = a.first, u1 = a.second; ll r2 = b.first, u2 = b.second; if (r1 != r2) return r1 < r2; return u2 < u1; } int main() { ios::sync_with_stdio(0); cin.tie(0); ll n, k; cin >> n >> k; vector<vector<ll>> r(n, vector<ll>(k, 0)), u(n, vector<ll>(k, 0)); for (ll i{}; i < n; i++){ for (ll j{}; j < k; j++){ cin >> r[i][j]; } } for (ll i{}; i < n; i++){ for (ll j{}; j < k; j++){ cin >> u[i][j]; } } vector<pair<ll,ll>> sortstuff; for (ll i{}; i < n; i++){ pair<ll,ll> a = {r[i][0], u[i][0]}; sortstuff.push_back(a); } sort(sortstuff.begin(), sortstuff.end(), comp); ll can = 0, mine = 0; for (ll i{}; i < n; i++){ if (sortstuff[i].first > mine) break; can++; mine += sortstuff[i].second; } cout << can; }