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

int main()
{
	int l, n, j;
	int *w;
	int sum = 0;

	cin >> l >> n;

	w = new int[n];
	for (int i = 0; i < n; i++)
	{
		cin >> w[i];
	}

	sort(w, w + n);


	for (j = 0; sum + w[j] < l; j++)
	{
		sum += w[j];
	}

	cout << j << endl;
	
}