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

public class Main {
    public static void main(String args[]) {
        
        Scanner sc = new Scanner(System.in);
        
        int L = sc.nextInt();
        int N = sc.nextInt();
        
        int[] W = new int[N];
        for(int i = 0; i < N; i++)
            W[i] = sc.nextInt();
        
        Arrays.sort(W);
        
        int sum = 0;
        int ans = 0;
        for(int i = 0; i < N; i++) {
            sum += W[i];
            if(sum <= L)
                ans++;
        }
        
        System.out.println(ans);
        
    }
}