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

public class Main {
    public static void main(String... args) {
        int L, N;
        var sin = new Scanner(System.in);
        L = Integer.parseInt(sin.nextLine());
        N = Integer.parseInt(sin.nextLine());
        String[] W = sin.nextLine().split(" ");
        int[] some = new int[W.length];
        Arrays.setAll(some, i -> Integer.parseInt(W[i]));
        Arrays.sort(some);

        int sum = 0, i;
        
        for (i = 0; i < N; i++) {
            sum += some[i];
            if (sum > L) break;
        }
        
        System.out.println(i);
        
    }
}