import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {
	public static void main(String args[]) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = br.readLine();
		int l = Integer.parseInt(line);
		line = br.readLine();
		int n = Integer.parseInt(line);
		line = br.readLine();
		String[] lines = line.split(" ");

		Arrays.sort(lines);

		int total = 0;
		int res = 0;
		for (int t = 0; t < n; t++) {
			int v = Integer.parseInt(lines[t]);
			if ((total + v) > l) {
				break;
			}
			total += v;
			res++;
		}
		System.out.println(res);
	}
}