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


int main() {
	int L,N;
	cin >> L >> N;
	vector<int> W(N);
	for (int i = 0; i < N; i++) cin >> W[i];

	sort(W.begin(),W.end());
	int cnt=0;
	for (int w = 0; w < L;) {
		if (w + W[cnt] <= L) {
			w += W[cnt];
			cnt++;
		}
		else break;
	}
	cout << cnt << endl;
}