import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int max = scan.nextInt();
        int boxCount = scan.nextInt();
        int[] boxSize = new int[boxCount];
        for(int i = 0 ; i < boxCount ; i++){
        	boxSize[i] = scan.nextInt();
        }
        Arrays.sort(boxSize);
        int count = 0;
        for(int i = 0 ; i < boxCount ; i++){
        	if(boxSize[i] <= max){
        		count++;
        		max = max - boxSize[i];
        	}else{
        		break;
        	}
        }
        System.out.println(count);
    }
}