import java.util.Scanner;
import java.util.Arrays;
public class No5{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int haba = sc.nextInt();
        int blockNumber = sc.nextInt();
        int[] blockHaba = new int[blockNumber];
        for (int i=0; i<blockNumber; i++){
            blockHaba[i] = sc.nextInt();
        }
        Arrays.sort(blockHaba);
        int i;
        int sum = 0;
        for (i=0; i<blockNumber; i++){
            sum = sum + blockHaba[i];
            if (sum > haba){
                break;
            }
        }
        System.out.println(i);
    }
}