import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner in = new Scanner(System.in);
        long box = in.nextLong();
        long N = in.nextLong();
        List<Long> list = new ArrayList<>();

        for(long i=0; i<N; i++){
            long block = in.nextLong();
            list.add(block);
        }
        // 5 7 10
        Collections.sort(list);

        long sum = 0;
        long count = 0;
        for(int i=0; i<N; i++){
            if( (sum + list.get(i)) <= box){
                sum += list.get(i);
                count++;
            }
        }
        System.out.println(count);
        
    }
}