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

public class No005 {

    public static void main(String[] args) {
        int BOX_L_SIZE;
        int N;
        int[] BOX_S;
        
        Scanner sc = new Scanner(System.in);
        BOX_L_SIZE = Integer.parseInt(sc.nextLine());
        N = Integer.parseInt(sc.nextLine());
        BOX_S = new int[N];
        String str = sc.nextLine();
        String[] inputs = str.split(" ");
        for(int i=0; i<N; i++){
            BOX_S[i] = Integer.parseInt(inputs[i]);
        }
        
        System.out.println(countBox(BOX_L_SIZE, BOX_S));
    }
    static int countBox(int boxSize, int[] boxS){
        int count = 0;
        int capaBox = boxSize;
        
        Arrays.sort(boxS);
        while(boxS[count] <= capaBox){
            capaBox -= boxS[count];
            count++;
            if(capaBox == 0)break;
        }
        return count;
    }
}