import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.math.*;
 
public class Main {
	public static void main(String[] args)throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		int l = Integer.parseInt(br.readLine());
		int n = Integer.parseInt(br.readLine());
		String[] str = br.readLine().split(" ");
		int[] w = new int[n];
		for(int i = 0; i < n; i++){
			w[i] = Integer.parseInt(str[i]);
		}
		Arrays.sort(w);
		int sum = 0;
		for(int i = 0; i < n; i++){
			sum += w[i];
			if(sum>l){
				sb.append(i);
				System.out.println(sb);
				return;
			}
		}
		sb.append(n);
		System.out.println(sb);
	}
}