#include <iostream>
#include <algorithm>

using namespace std;

int main(void) {
	int L = 0, N = 0, ans = 0;;
	int w[10000] = {0};
	long sum = 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++){
		sum += w[i];
		if(L==sum){
			ans = i+1;
			break;
		}
		if(L < sum){
			ans = i;
			break;
		}
	}

	cout << ans << endl;

	return 0;

}