#include <iostream>
#include <vector>
#include <algorithm>

int main()
{
	int l, n;

	std::cin >> l >> n;

	std::vector<int> v(n);

	for (int i = 0; i < n; i++) {
		std::cin >> v[i];
	}

	std::sort(v.begin(), v.end());

	int ans = 0, sum = 0;
	for (int i = 0; i < n; i++) {
		if (sum + v[i] <= l) {
			sum += v[i];
			ans++;
		}
	}

	std::cout << ans << std::endl;
	return 0;
}