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

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int l = sc.nextInt();
		int n = sc.nextInt();
		int[] N = new int[n];
		int ans = 0;

		for(int i = 0; i < n; i++){
			N[i] = sc.nextInt();
		}

		Arrays.sort(N);

		int i = 0;
		while(l >= ans){
			ans += N[i];
			i++;
			if(i == n && ans <= l){
				i++;
				break;
			}else if(i == n){
				break;
			}
		}
		System.out.println(i - 1);
	}

}