#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

template<typename T>
istream& operator >> (istream& is, vector<T>& vec){
  for(T& x: vec) is >> x;
  return is;
}

int main(int argc, char** argv) {
  int l, n;
  cin >> l >> n;
  vector<int> w(n);
  cin >> w;
  sort(w.begin(), w.end());
  int ans = 0, sum = 0;
  while (sum < l) sum += w.at(ans++);
  cout << ans - 1 << endl;
}