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

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int L = scan.nextInt();
		int N = scan.nextInt();
		int[] numbers = new int[N];

		for(int i = 0; i < numbers.length; i++){
			numbers[i] = scan.nextInt();
		}

		Arrays.sort(numbers);
		int total = 0;
		int count = 0;

		for(int i = 0; i < numbers.length; i++){
			total += numbers[i];
			if(total > L) break;

			count++;
		}
		System.out.println(count);
	}

}