import java.util.*;

public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int L = sc.nextInt(); 
int bn = sc.nextInt(); 
int[] bw = new int[bn];
int sum=0;
int answer=0;
for(int i=0;i<bn;i++){
  bw[i] = sc.nextInt(); 
}
Arrays.sort(bw);
for(int i=1;i<=bn;i++){
     sum+=bw[i-1];
  if(L>=sum){
    if(i==bn){
    answer = bn;
    }
  }else{
  answer = i-1;
  break;
  }
}
System.out.println(answer);
}
}