#include <iostream>
#include <queue>

int main()
{
	int L; std::cin >> L;
	int N; std::cin >> N;
	std::priority_queue<int, std::vector<int>, std::greater<int> > pq;
	int tmp;
	while(std::cin >> tmp)
	{
		pq.push(tmp);
	}

	int sum = 0 , n = 0;
	while(sum <= L)
	{
		sum += pq.top(); pq.pop();
		n++;
	}
	n--;
	std::cout << n << std::endl;
	return 0;
}