#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
	int l, n, w[10000];
	cin >> l >> n;
	for (int i = 0; i < n; i++) {
		cin >> w[i];
	}
	sort(w, w + n);
	int sum = 0, ans = n;
	for (int i = 0; i < n || l < sum; i++) {
		sum += w[i];
		if (l < sum) {
			ans = i;
			break;
		}
	}
	cout << ans << endl;
	return 0;
}