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

class sampleA {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int l = scan.nextInt();
		int n = scan.nextInt();
		List<Integer> blocksLength = new ArrayList<>();
		int sumW = 0;

		for (int i = 0; i <= n; i++) {
			blocksLength.add(scan.nextInt());
		}

		scan.close();
		Collections.sort(blocksLength);

		for (int i = 0; i <= n; i++) {
			if (sumW + blocksLength.get(i) <= l) {
				sumW += blocksLength.get(i);

			} else {
				System.out.print(i);
				break;
			}
		}
	}
}