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

public class Main {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
        	int l=sc.nextInt();
        	int n=sc.nextInt();
        	int result=0;
        	int[] box=new int[n];
        	
        	for(int i=0;i<n;i++){
        		box[i]=sc.nextInt();
        	}
        	
        	Arrays.sort(box);
        	
        	for(int i=0;i<n;i++){
        		result+=box[i];
        		if(result<=l) continue;
        		else{
        			System.out.println(i);
        			break;
        		}
        	}
        	
        }
    }
}