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

public class Main {
    public static void main(String[] args){
        // Here your code !
        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 In = 0;
        for(int i = 0; i<N; i++){
            L -= W[i];
            if(L>=0){
                In++;
            }else{
                break;
            }
        }
        System.out.println(In);
        
    }
}