#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;


int main(){
	int i, j, k;
	int l, n;
	vector<int>w;

	cin >> l >> n;

	for (i = 0; i < n; i++) {
		int num;
		cin >> num;
		w.push_back(num);
	}

	sort(w.begin(), w.end());
	int cnt = 0;
	int sum = 0;

	for (i = 0; i < w.size(); i++) {
		sum += w[i];
		if (sum > l) {
			break;
		}
		else {
			cnt++;
		}
	}

	cout << cnt << endl;


	getchar();
	getchar();
	return 0;
}