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

/* alias */
using ull = unsigned long long;
using ll = long long;
using vi = vector<int>;
using vl = vector<long>;
using vll = vector<long long>;
using vvi = vector<vi>;
using vvl = vector<vl>;
using vvll = vector<vll>;
using vc = vector<char>;
using vs = vector<string>;
using pii = pair<int, int>;

/* define short */
#define pb push_back
#define mp make_pair
#define all(obj) obj.begin(), obj.end()
#define bit(n) (1LL<<(n))
#define YESNO(bool) if(bool){cout<<"YES"<<endl;}else{cout<<"NO"<<endl;}
#define yesno(bool) if(bool){cout<<"yes"<<endl;}else{cout<<"no"<<endl;}
#define YesNo(bool) if(bool){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}

/* REP macro */
#define reps(i,a,n) for(ll i = (a); i < (ll)(n); i++)
#define rep(i, n) reps(i,0,n)
#define rrep(i,a,n) for(ll i=n-1;i>=0;i--)

/* func */
inline int in_int() {int x; cin >> x; return x;}
inline ll in_ll() {ll x; cin >> x; return x;}
inline string in_str() {string x; cin >> x; return x;}
// 第一引数と第二引数を比較し、第一引数(a)をより大きい/小さい値に上書き
template <typename T> inline bool chmin(T& a, const T& b) {bool compare = a > b; if (a > b) a = b; return compare;}
template <typename T> inline bool chmax(T& a, const T& b) {bool compare = a < b; if (a < b) a = b; return compare;}

/* global */
const int INF = INT_MAX / 2;
const ll LINF = 1LL << 60;
const ll MOD = 1e9 + 7;
int L, N;

int main(){
    cin >> L >> N;
    vi W(N);
    rep(i, N){
        cin >> W[i];
    }
    sort(all(W));
    int cnt = 0;
    rep(i, N){
        L -= W[i];
        if(L < 0)   break;
        cnt++;
    }
    cout << cnt << endl;
}