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

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

		int len = sc.nextInt(), n = sc.nextInt();
		int[] t = new int[n];
		for(int i = 0; i < n; i++){
			t[i] = sc.nextInt();
		}
		Arrays.sort(t);
		int cnt = 0, sum = 0;
		for(int i = 0; i < n; i++){
			sum += t[i];
			if(sum <= len){
				cnt++;
			} else {
				break;
			}
		}
		System.out.println(cnt);
	}
}