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

int main(){
	int l,n,count = 0,sum = 0;
	int v[10001];
	cin >> l >> n;
	for(int i=0; i<n; i++){
		cin >> v[i];
	}
	sort(v,v+n);

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

	
}