#include <bits/stdc++.h>
using namespace std;

namespace
{
int W[ 10100 ];
}

int main()
{
int i;
int L;
int N;
int iS;

	cin >> L;
	cin >> N;

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

	sort( W, W +N );

	iS = L;
	for( i = 0; i < N; i++ )
	{
		iS -= W[ i ];
		if( iS < 0 ) break;
	}

	cout << i << endl;

	return 0;
}