#include "bits/stdc++.h"
using namespace std;

int main() {
	int L, N, W[10000], count = 0;
	cin >> L >> N;
	for (int i = 0; i < N; i++) {
		cin >> W[i];
	}
	sort(W, W + N);
	for (int i = 0; i < N; i++) {
		L -= W[i];
		if (L <= 0) break;
		count++;
	}
	cout << count << endl;
}