import java.util.*;
 

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int L=sc.nextInt();
		int N = sc.nextInt();
		int[] block = new int[N];
		for(int i=0;i<N;i++){
			block[i]=sc.nextInt();
		}
		Arrays.sort(block);
		int sum=0;
		int ans=0;
		int iti=0;
		while(sum<=L){
			sum+=block[iti];
			iti++;
			ans++;
			if(iti==N){
				if(sum>L){
					System.out.println(ans-1);
					return;
				}
				System.out.println(ans);
				return;
			}
		}
		System.out.println(ans-1);
	}
}