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

class Main{
    public static void main(String args[]){
	
	Scanner scan = new Scanner(System.in);

	int L = scan.nextInt();
	int N = scan.nextInt();

	int[] W = new int[N];

	for(int i = 0; i < N; i++){
	    W[i] = scan.nextInt();
	}

	Arrays.sort(W);

	int cnt = 0;

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

	System.out.println(cnt);

    }
    
}