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

public class Main {

	public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      
	      try {
	    	  int L = Integer.parseInt(stdReader.readLine());
	    	  int N = Integer.parseInt(stdReader.readLine());
	    	  String[] temps = stdReader.readLine().split(" ");
	    	  int[] nums = new int[temps.length];
	    	  for(int i=0;i<temps.length;i++){
	    		  nums[i] = Integer.parseInt(temps[i]);
	    	  }
	    	  
	    	  Arrays.sort(nums);
	    	  int sum = 0;
	    	  int count = 0;
	    	  for(int i=0;i<nums.length;i++){
	    		  sum += nums[i];
	    		  if(sum>L){
	    			  break;
	    		  }
	    		  count++;
	    	  }
			  System.out.println(count);
	      } catch (IOException e) {
			e.printStackTrace();
	      }
	}
}