#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main(void)
{
	int L, N; cin >> L >> N;
	vector<int> V(N);
	for (int i = 0; i < N; i++){
		cin >> V[i];
	}
	sort(V.begin(), V.end());
	int sum = 0, i = 0;
	for (i = 0; i < N && sum + V[i] <= L; ++i){
		sum += V[i];
	}
	cout << i << endl;
	return 0;
}