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

public class No00000005_Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int lineCnt = 0;
		int l = 0;
		int n = 0;
		String[] wi = null;

		while(scan.hasNextLine()) {
			lineCnt++;
			if(lineCnt == 1) {
				l = Integer.parseInt(scan.nextLine());
			} else if(lineCnt == 2) {
				n =  Integer.parseInt(scan.nextLine());
			} else if(lineCnt == 3) {
				wi = scan.nextLine().split(" ");
			}
			if(lineCnt == 3) {
				break;
			}
		}

		Arrays.sort(wi);

		int cnt = 0;
		int sum = 0;
		for(int i = 0; i < n; i++) {
			int temp = Integer.parseInt(wi[i]);
			if(sum + temp > l) {
				break;
			}
			sum += temp;
			cnt++;
		}

		System.out.println(cnt);

		scan.close();

	}

}