#include "bits/stdc++.h"

using namespace std;

const char en = '\n';
using  ll =          long long;
using ull = unsigned long long;

int main() {
	int l,n,result=0;
	cin>>l>>n;

	priority_queue<int,vector<int>,greater<int>> in;
	{
		int j;
		for(int i=0;i<n;i++){
			cin>>j;
			in.push(j);
		}
	}
	int sum=0;
	while(!in.empty()){
		sum+=in.top();
		in.pop();
		result++;
		if(sum>l){
			result--;
			break;
		}
	}

	cout<<result<<en;

	return 0;
}