package coder;

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

public class No5 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);

		int width = scanner.nextInt();
		int num = scanner.nextInt();
		int[] blockWidth = new int[num];

		for(int i = 0; i < num; i++) {
			blockWidth[i] = scanner.nextInt();
		}

		Arrays.sort(blockWidth);

		int sum = 0;
		int maxNum = 0;
		for(int i = 0; i < num; i++) {
			sum += blockWidth[i];
			if(sum > width) {
				break;
			}
			maxNum++;
		}
		System.out.println(maxNum);

		scanner.close();
	}

}