import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;

public class Main{

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int L = Integer.parseInt(br.readLine());
		int N = Integer.parseInt(br.readLine());
		String s[] = br.readLine().split(" ");
		ArrayList<Integer> w = new ArrayList<Integer>();
		for(int i=0;i<N;i++){
			w.add(Integer.parseInt(s[i]));
		}
		Collections.sort(w);
		int sum=0,result = 0;
		for(;result < N;result++){
			sum+=w.get(result);
			if(sum > L){break;}
		}
		System.out.println(result);
	}

}