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

public 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 now_wide = 0;
		int i = 0;
		while(l >= now_wide + w[i] && n>i){
			now_wide += w[i];
			i++;
		}
		System.out.println(i);
	}
}