#include <iostream>
#include <algorithm>
using namespace std;

int main() {
	int L, N, w[10000], cnt=0;
	cin >> L >> N;
	for (int i = 0; i < N; i++) cin >> w[i];
	sort(w, w + N);
	for (int i = 0; i < N; i++) {
		L -= w[i];
		if (L <= 0)break;
		cnt++;
	}
	cout << cnt << endl;
	return 0;
}