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

int main(void)
{
	int width, N, riz;

	scanf("%d", &width);
	scanf("%d", &N);

	vector<int> block(N);

	for(int i = 0; i < N; i++)
		scanf("%d", &block[i]);

	sort(block.begin(), block.end());

	for(riz = 0; (riz < N) && (width > 0); riz++)
		width -= block[riz];

	if(width < 0)
		riz--;

	printf("%d\n", riz);

	return 0;
}