import java.util.Scanner;
import java.lang.Math;

    public class Main {
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            
            int l = sc.nextInt();
            int n = sc.nextInt();
            int[] A = new int[n];
            for(int i=0; i<n; i++){
                A[i] = sc.nextInt();
            }
            
            for(int j=0; j<A.length-1; j++){
                for(int k=n-1; k>j; k--){
                    if(A[k] < A[k-1]){
                        int temp = A[k];
                        A[k] = A[k-1];
                        A[k-1] = temp;
                    }
                }
            }
            
            int ans = 0;
            while(ans<n){
                l -= A[ans];
                if(l<0){
                    break;
                }
                ans++;
            }
            
            System.out.println(ans);
        }
    }