#include <iostream>
using namespace std;

int main()
{
	int L, N, W[1000];
	int max = 0;

	cin >> L >> N;

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

	for (int i = 0; i < N - 1; i++)
	{
		int j = i;
		for (int k = i; k < N; k++)
		{
			if (W[k] < W[j])
			{
				j = k;
			}
		}
		if (i < j)
		{
			double swap = W[i];
			W[i] = W[j];
			W[j] = swap;
		}
	}

	for (int i = 0; i < N; i++)
	{
		max += W[i];

		if (max > L)
		{
			cout << i << endl;
			break;
		}
		else if(max==L)
		{
			cout << i+1 << endl;
			break;
		}
	}


	return 0;
}