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

int main(void){
	int box;
	int num;
	int boxlen[10000];
	int boxsum = 0;
	int innum = 0;
	int i;
	cin >> box >> num;
	for(i = 0;i < num;i++){
		cin >> boxlen[i];
	}
	sort(boxlen, boxlen + num);
	for(i = 0;i < num;i++){
		boxsum = boxsum + boxlen[i];
		if(box >= boxsum){
			innum++;
		}
	}
	cout << innum << '\n';

}