import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Stream;

public class Main {
	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		// L
		int numL = Integer.parseInt(br.readLine());
		// N
		int numN = Integer.parseInt(br.readLine());
		// W1,W2,,,,,Wn
		int[] numW = Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).sorted().toArray();

		int sum = 0;
		int count = 0;

		for (int num : numW) {
			sum += num;

			if (sum > numL) break; else count++;

		}

		System.out.println(count);

	}
}