import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));

		try {
			int L = Integer.parseInt(buff.readLine());
			int N = Integer.parseInt(buff.readLine());
			int[] box = new int[N];
			String[] str = buff.readLine().split(" ");

			for (int i = 0; i < N; ++i) {
				box[i] = Integer.parseInt(str[i]);
				for (int j = 0; j < i; ++j) {
					if (box[i] < box[j]) {
						int w = box[i];
						box[i] = box[j];
						box[j] = w;
					}
				}
			}
			int ans = 0;
			int sum = 0;
			for (int i = 0; i < N; ++i) {
				sum += box[i];
				if (sum > L) {
					break;
				}
				++ans;
			}

			System.out.println(ans);
		} catch (NumberFormatException e) {

		} catch (IOException e) {

		}
	}
}