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

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

        int width = Integer.valueOf(sc.nextLine());
        int blockNum = Integer.valueOf(sc.nextLine());

        int blocks[] = new int[blockNum];
        for(int i=0; i<blockNum; i++) {
        	blocks[i] = Integer.valueOf(sc.next());
        }

        Arrays.sort(blocks);

        for(int i=0; i<blockNum; i++) {
        	if(width < blocks[i]) {
        		System.out.println(i);
        		return;
        	}
        	width -= blocks[i];
        }
        System.out.println(blockNum);
	}
}