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

int main() {
	int L, N;
	cin >>L>>N;
	int W[N];
	int i,sum,box;
	for (i = 1; i <= N; i++)
	{
		cin >> W[i - 1];
	}
	sort(W, W + N);

	sum = 0;
	box = 0;

	for (i = 1; i <= N; i++)
	{
		sum += W[i - 1];
		box++;
		if (sum == L) {
			break;
		}
		if (sum > L) {
			sum-= W[i - 1];
			box--;
			break;
		}
	}
	
	cout <<box<< "\n";
}