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

int main() {
	int box_width, toys;
	std::cin >> box_width >> toys;

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

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

	int count = 0;
	while (box_width > v[count]) {
		box_width -= v[count];
		count++;
	}
	std::cout << count << std::endl;
	return 0;
}