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(),n=sc.nextInt(),w[]=new int[n],t=0,i;
		for(i=0;i<n;++i) w[i]=sc.nextInt();
		sc.close();
		Arrays.sort(w);
		for(i=0;i<n;++i) {
			t+=w[i];
			if(t>l) break;
		}
		System.out.print(i);
	}
}