#include <iostream>
using namespace std;

int main(void){
	int i,v,l,n;
	cin >> l >> n;
	int w[n];
	for(i = 0;i < n;i++) cin >> w[i];
	for(i = 0;l >= 0 && i < n;i++){
		for(int t = i;t < n;++t){
			if(w[i] > w[t]){
				v = w[t];
				w[t] = w[i];
				w[i] = v;
			}
		}
		l -= w[i];
	}
	cout << i << endl;
}