using System;
public class Hello{
    static void Ascsort(int[] a){
        for(int i = 0;i < a.Length - 1;i++){
            for(int j = i + 1;j < a.Length;j++){
                if(a[i] > a[j]){
                    int temp;
                    temp = a[i];
                    a[i] = a[j];
                    a[j] = temp;
                }
            }
        }
    }
    public static void Main(){
        int L = int.Parse(Console.ReadLine());
        int N = int.Parse(Console.ReadLine());
        string[] input = Console.ReadLine().Split(' ');
        int[] block = new int[N];
        for(int x = 0;x < N;x++){
            block[x] = int.Parse(input[x]);
        }
        
        Ascsort(block);
        
        int count = 0;
        while(L - block[count] >= 0){
            L -= block[count];
            count++;
        }
        Console.WriteLine(count);
    }
}