#define _CRT_SECURE_NO_WARNINGS
#include <cstdio>
#include <vector>
#include <algorithm>	//sort
#include <cstdlib>

using namespace std;
int main() {
	int L, N;
	vector<int> vc;
	int t;
	int ans = 0;

	scanf("%d", &L);
	scanf("%d", &N);

	for (int i = 0; i < N; i++) {
		scanf("%d", &t);
		vc.push_back(t);
	}
	sort(vc.begin(), vc.end());

	for (int i = 0; i < N; i++) {
		L -= vc.front();
		if (L <= 0) break;
		vc.erase(vc.begin());
		ans++;
	}
	printf("%d", ans);

	//system("PAUSE");
	return 0;
}