import java.io.*;
import java.util.*;

class Main5 {
	
	public static int solve (int[] wides , int max) {
		int ret = 0 , sum = 0;
		for (int i = 0; i < wides.length; i++) {
			if (sum + wides[i] <= max) {
				sum += wides[i];
				ret++;
			} else {
				break;
			}
		}
		return ret;
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
			
		int max = Integer.parseInt(br.readLine());
		int blockCnt = Integer.parseInt(br.readLine());
		int[] wides = new int[blockCnt];
		
		String[] str = br.readLine().split(" ");
		for (int i = 0; i < blockCnt; i++) {
			wides[i] = Integer.parseInt(str[i]);
		}
		
		Arrays.sort(wides);
		
		System.out.println(solve(wides , max));
	}
}