#include <cstdio>
#include <algorithm>
#include <vector>

int main(void)
{
	using namespace std;

	int l, n;
	vector<int> W;

	scanf("%d%d", &l, &n);
	for (int i = 0; i < n; i++)
	{
		int tmp;
		scanf("%d", &tmp);
		W.push_back(tmp);
	}
	sort(W.begin(), W.end());
	
	int sum = 0;

	int i = 0;
	while (sum < l)
	{
		sum += W[i];
		i++;
	}

	printf("%d\n", i - 1);
}