#include<iostream>
#include<string>
#include<math.h>
using namespace std;

int main() 
{
	int sum;
	cin >> sum;
	long int  blocks[10000];
	int kara[1];
	int n;
	cin >> n;
	int ans=0;
	for (int i = 0; i <= n - 1; i++) {
		blocks[i] = 0;
		cin >> blocks[i];
	}
	for (int k = 0; k <= n - 1; k++) {
		for (int j = k; j <= n - 1; j++) {
			if (blocks[j] < blocks[k]) {
				kara[0] = blocks[k];
				blocks[k] = blocks[j];
				blocks[j] = kara[0];
			}
		}
	}
	
	for (int s = 0; s <= n - 1; s++) {
		ans = ans + blocks[s];
		if (ans > sum) {
			cout << s;
			
			break;
		}
		else if (s == n - 1) {
			
			cout << s + 1;
		}
	}
}