import java.util.*;

public class Yukicoder_5{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		int L = stdIn.nextInt();
		int N = stdIn.nextInt();
		int[] W = new int[N];
		for(int i=0;i<N;i++){
			W[i] = stdIn.nextInt();
		}

		Arrays.sort(W);
		int count = 0;

		for(int i=0;i<N;i++){
			if(L-W[i]<0){
				break;
			}
			L = L - W[i];
			count++;
		}

		System.out.println(count);

	}
}