#include <iostream>
#include <cstdio>
#include <string>
#include <sstream>
#include <algorithm>
#include <math.h>
#include <map>
#include <iomanip>
#include <vector>
#include <queue>
#include <set>
#define PI 3.14159265359
#define INF 99999999;
#define rep(i, n) for(int i=0; i<n; i++)
#define REP(n) rep(i, n)
#define EPS 1e-10
typedef long long ll;
using namespace std;



/*
class Target
{
public:
	vector <string> draw(int n)
	{

	}
};
*/



int main()
{
	int L, N, width = 0;
	
	cin >> L >> N;
	int W[N];
	
	REP(N) cin >> W[i];
	sort(W, W + N);
	
	int i;
	for (i=0; i<N; i++)
	{
		width += W[i];
		if (width > L) break;
	}
	
	cout << i << endl;
	
	//テスト出力
	//REP(N) cout << W[i] << " ";
	
	return 0;
}