import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int L=Integer.parseInt(sc.next());
        int N = Integer.parseInt(sc.next());
        int[] block=new int[N];
        for (int i = 0; i < N; i++) {
            block[i] = Integer.parseInt(sc.next());
        }
        Arrays.sort(block);

        int length=0;
        int count=0;
        do{
            length+=block[count];
            count++;
        }while(L>length);


            System.out.println(count-1);

    }
}