package yukicoder;

import java.util.Scanner;

public class No5v2 {
public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	int L = sc.nextInt();
	int N = sc.nextInt();
	int[] w = new int[N];
	int tmp = 0;
	int c = 0;
	int CL = L;
	int k = 0;
	for(int i = 0; i < w.length; i++){
		w[i] = sc.nextInt();
	}
	for(int j = 1; j < w.length; j++){
		int tmp2 = w[j];
		int i = j - 1;
		while(i >= 0 && w[i] > tmp2){
			w[i + 1] = w[i];
			i--;
		}
		w[i + 1] = tmp2;
	}
	while(CL >0 && CL - w[k] > 0){
		CL -= w[k];
		k++;
		c++;
	}
	System.out.println(c);
	sc.close();
}
}