#include <bits/stdc++.h>
#define FOR(I,A,B) for(int I=A;I<B;I++)
#define ALL(C) C.begin(), C.end()
using namespace std;
int main()
{
	int L, N;
	cin >> L >> N;
	vector<int> W(N);
	FOR(i,0,N) cin >> W[i];
	sort(ALL(W)); 
	int a=0;
	int s=0;
	FOR(i,0,N)
	{
		s+=W[i];
		if ( s >= L ) break;
		a++;
	}
	cout << a << endl;
	return EXIT_SUCCESS;
}