import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    static int target;
    static boolean[][] visited;
    static int[] values;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        target = sc.nextInt();
        int start = sc.nextInt();
        values = new int[n];
        for (int i = 0; i < n; i++) {
            values[n - i - 1] = sc.nextInt();
        }
        visited = new boolean[n][1001];
        System.out.println(dfw(n - 1, start) ? "Yes" : "No");
    }
    
    static boolean dfw(int idx, int v) {
        if (v == target) {
            return true;
        }
        if (idx < 0) {
            return false;
        }
        if (!visited[idx][v]) {
            visited[idx][v] = true;
            return dfw(idx - 1, v) || dfw(idx - 1, (v + values[idx]) / 2);
        } else {
            return false;
        }
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}