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

int main()
{
	int L, N, i, result = 0;
	int *W;

	cin >> L >> N;
	W = new int[N+1];

	for (i = 0; i < N; i++)
	{
		cin >> W[i];
	}
	W[N] = 1;
	stable_sort(W, W + N);

	i = 0;
	while (result <= L)
	{
		result += W[i];
		i++;
	}

	cout << i-1 << endl;

	delete[] W;
	return 0;
}