#include <bits/stdc++.h>
using namespace std;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int L, n;
  cin >> L >> n;
  vector<int> w(n);
  for (auto& i : w) cin >> i;
  sort(w.begin(), w.end());
  int cnt = 0;
  for (auto& i : w) {
    L -= i;
    if (L < 0) break;
    cnt++;
  }
  cout << cnt << endl;
  return 0;
}