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

int main()
{
	int l, n;
	int w[10000];

	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)
		{
			cout << i << endl;
			return 0;
		}
	}

	cout << n << endl;
	return 0;
}