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

public class Main {
    public static void main(String[]args) {
        Scanner sc = new Scanner(System.in);
        int L = sc.nextInt();
        int N = sc.nextInt();
        int[] W = new int[N];
        for(int i = 0; i < N; i++) {
            W[i] = sc.nextInt();
        }
        Arrays.sort(W);
        int ans = 0;
        int n = 0;
        for(int i = 0; n < L; i++) {
            n += W[i];
            if(n > L) {
                break;
            };
            ans ++;
        }
        System.out.println(ans);
    }
}