#include <bits/stdc++.h>
#define rep(i,a,b) for(int i = (a); i < (b); i++)
#define all(A) (A).begin(),(A).end()
#define MOD 1000000007
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;

int main() {
	int l,n; cin >> l >> n;
	vector<int> W(n); rep(i,0,n) cin >> W[i];
	sort(all(W));
	int ans = 0;
	rep(i,0,n){
		if(l > 0){
			l -= W[i];
			ans++;
		}
	}
	if(l < 0) ans--;
	cout << ans;
}