import java.util.Arrays;
import java.util.Scanner;
 
class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int l = sc.nextInt();
		int n = sc.nextInt();
		int[] w = new int[n];
		for(int i=0;i<n;i++){
			w[i] = sc.nextInt();
		}
		Arrays.sort(w);
		int sum = 0;
		int cnt = 0;
		for(int i=0;i<n;i++){
			sum += w[i];
			if(sum > l){
				break;
			}
			cnt++;
		}
		
		System.out.println(cnt);
	}
}