import java.util.*;
public class Test11 {
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    String[] line;
    line=sc.nextLine().split(" ");
    int w=Integer.parseInt(line[0]);
    line=sc.nextLine().split(" ");
    int n=Integer.parseInt(line[0]);
    int m=0,size=0;
    int[] block=new int[n];
    line=sc.nextLine().split(" ");
    for(int i=0;i<n;i++){
      block[i]=Integer.parseInt(line[i]);
    }
    Arrays.sort(block);
    for(int i=0;i<n;i++){
      size+=block[i];
      if(w<size){
        break;
      }
      m++;
    }
    String result=""+m;
    System.out.println(result);
  }
}