package yukicoder;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class N5 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int l = sc.nextInt();
		int n = sc.nextInt();
		int c = 0;
		ArrayList<Integer> blocks = new ArrayList<Integer>();
		
		for(int i = 0;i < n;++i){
			blocks.add(sc.nextInt());
		}
		
		Collections.sort(blocks);
		
		for(int b:blocks){
			l -= b;
			if(l < 0){
				System.out.println(c);
				return;
			}
			++c;
		}
		System.out.println(c);
	}
}