#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;

int L, N, Lim;

int main() {
	cin >> L;
	cin >> N;

	vector<int> Wi(N);
	for (int i = 0; i < N; i++)
	{
		cin >> Wi[i];
	}

	//----------input----------

	sort(Wi.begin(), Wi.end());

	for (int i = 0; i < N; i++)
	{
		Lim += Wi[i];
		if (Lim > L) {
			cout << i << endl;
			break;
		}
		else if (L == 1 && N == 1 && Wi[0] == 1) {
			cout << 1 << endl;
			break;
		}
	}

	return 0;
}