package main

import . "fmt"

func main() {
	var n,m,l int
	Scan(&n,&m,&l)
	cur := make([]bool, 1001)
	cur[l] = true
	for i := 0; i < n; i++{
		var a int
		Scan(&a)
		tmp := append([]bool{}, cur...)
		for i, ex := range cur {
			if !ex {
				continue
			}
			tmp[(i+a)/2] = true
		}
		cur = tmp
	}
	if cur[m] {
		Println("Yes")
	} else {
		Println("No")
	}
}