#include "bits/stdc++.h"
using namespace std;
using ll = long long; using ull = unsigned long long;
using vb = vector<bool>; using vvb = vector<vb>;
using vi = vector<int>; using vvi = vector<vi>;
using vl = vector<ll>; using vvl = vector<vl>;
using pii = pair<int,int>; using pll = pair<ll,ll>;
#define FOR(i,a,b) for(ll i = (a); i < (ll)(b); ++i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) for(ll i = (ll)(n)-1;i >= 0;--i)
#define ALL(obj) (obj).begin(), (obj).end()
#define rALL(obj) (obj).rbegin(), (obj).rend()
#define eb(val) emplace_back(val)
const double PI = acos(-1);
const double EPS = 1e-10;
const ll MOD = 1e9+7;
//#define int ll
void cioacc(){//accelerate cin/cout
  cin.tie(0);
  ios::sync_with_stdio(false);
}
signed main(){
  int l,n;
  cin >> l >> n;
  vi a(n);
  REP(i,n) cin >> a.at(i);
  sort(ALL(a));
  int wt = 0;
  int ans = 0;
  REP(i,n){
    if(wt+a.at(i)>l) break;
    wt += a.at(i);
    ++ans;
  }
  cout << ans << endl;
}