import java.util.*;

public class Test {
    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);
        int l = s.nextInt();
        int n = s.nextInt();
        int w[] = new int[n];

        for(int i=0;i<n;i++){
        	w[i] = s.nextInt();
        }

        Arrays.sort(w);

        int count = 0;

        for(int i=0;i<n;i++){
        	l -= w[i];
        	if(l >= 0){
        		count++;
        	}
        	else{
        		break;
        	}
        }

        System.out.println(count);

    }
}