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

#define FOR(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep(i, n) FOR(i, 0, n)
#define ALL(v) v.begin(), v.end()
#define REV(v) v.rbegin(), v.rend()
#define MEMSET(v, s) memset(v, s, sizeof(v))
#define UNIQUE(v) (v).erase(unique(ALL(v)), (v).end())
#define MP make_pair
#define MT make_tuple

int main(){

  int L, N, t;
  vector<int> w;
  cin >> L;
  cin >> N;
  rep(i, N) {
    cin >> t;
    w.push_back(t);
  }
  sort(ALL(w));

  int cnt = 0;
  for(int a: w) {
    L -= a;
    if(L >= 0){
      cnt += 1;
    } else {
      break;
    }
  }
  cout << cnt << endl;
  return 0;
}