import java.util.*;

class NumBlocks
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        int l = sc.nextInt();
        int n = sc.nextInt();
        int[] intWi = new int[n];
        for (int i = 0; i < n; i++) {
            intWi[i] = sc.nextInt();
        }

        Arrays.sort(intWi);
        int result = 0;
        for (int i = 0; i < n; i++) {
            l -= intWi[i];
            if (0 <= l) 
                result++;
        }
        System.out.println(result);
    }
}