package main

import . "fmt"

func main() {
	var n, w int
	Scan(&n,&w)
	a := make([]int, n)
	for i := range a {
		Scan(&a[i])
	}
	ans := 0
	for b := 1; b < (1<<len(a)); b++ {
		t := []int{}
		for i, v := range a {
			if (b&(1<<i)) != 0 {
				t = append(t, v)
			}
		}
		for k := 0; k < (1<<len(t)); k++ {
			s := 0
			for i, v := range t {
				if (k&(1<<i)) != 0 {
					s += v/2
				} else {
					s += v
				}
			}
			if s == w {
				ans++
				break
			}
		}
	}
	Println(ans)
}