import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Box {

    public static void main(String[] args) {
        
        Scanner scanner = new Scanner(System.in);
        
        int l = scanner.nextInt();
        int n = scanner.nextInt();
        
        ArrayList<Integer> width = new ArrayList();
        
        for(int i=0;i<n;i++){
            width.add(scanner.nextInt());
        }
        
        Collections.sort(width);
        
        int sum = 0;
        int count = 0;
        
        for(int i=0;i<width.size();i++){
            
            sum += width.get(i);
            
            if(sum <= l){
                count++;
            }else{
                break;
            }
               
        }
        
        System.out.println(count);
    }
    
}