import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int boxWidth = sc.nextInt();
        int numBlock = sc.nextInt();

        List<Integer> blockWidthList = new ArrayList<Integer>();
        for (int i = 0; i < numBlock; i++) {
            blockWidthList.add(sc.nextInt());
        }

        Collections.sort(blockWidthList);
        int count = 0;
        int filledWidth = 0;
        for (Integer width : blockWidthList) {
            filledWidth += width;
            if (filledWidth > boxWidth) {
                break;
            }
            count++;
        }

        System.out.println(count);
    }
}