#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

int main(){
	int l ,n;
	cin >> l >>  n;
	vector<int> v(n);
	for(int i = 0; i < n; i++) cin >> v[i];

	
	int sum = 0,
		res = -1;
		
	sort(v.begin(), v.end());

	for(int i = 0; i<n; i++){
		sum += v[i];
		if(sum > l){
			sum -= v[i];
			res = i;
			break;
		}
	}
	if(res == -1) res = n;
	cout << res << endl;
}