import java.util.*;
import java.io.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
		long k=sc.nextLong();
		long[] a=new long[n];
		for(int i=0;i<n;i++){
		    a[i] = sc.nextLong();
		}
		Set<Long> target = new HashSet<Long>();
		 for (long i = 0; i < 1 << n; i++) {
		     long sum=0;
		     long cnt=0;
		     long pro=1;
            for (int j = 0; j < n; j++) {
                if ((1 & i >> j) == 1) {
                    sum+=a[j];
                    cnt+=1;
                    pro*=a[j];
                }
            }
            if(cnt>=k){
                target.add(sum);
                target.add(pro);
            }
		 }
		 System.out.println((target.size()));
		 sc.close();
	}
}