import java.io.*;
import java.util.Locale;
import java.util.StringTokenizer;


public class E {
    String filename = "addition";//filename here, System.in/out if no file

    FastScanner in;
    PrintWriter out;
    int n;
    int k;
    int a;
    int b;
    int[] x;

    void solve() {
//your code here
        n = in.nextInt();
        k = in.nextInt();
        a = in.nextInt();
        b = in.nextInt();
        x = new int[n];
        for (int i = 0; i < n; i++) {
            x[i] = in.nextInt();
        }

    }

    void run() throws IOException {
        InputStream input = System.in;
        OutputStream output = System.out;
     /*   try {
            File f = new File(filename + ".in");
            if (f.exists() && f.canRead()) {
                input = new FileInputStream(f);
                output = new FileOutputStream(filename + ".out");
            }
        } catch (IOException e) {
        }*/
        in = new FastScanner(input);
        out = new PrintWriter(new BufferedOutputStream(output));
        solve();
        in.close();
        out.close();
    }

    public static void main(String[] args) throws IOException {
        Locale.setDefault(Locale.US);
        new E().run();
    }

    class FastScanner implements Closeable {
        private BufferedReader br;
        private StringTokenizer tokenizer;

        public FastScanner(InputStream stream) throws FileNotFoundException {
            br = new BufferedReader(new InputStreamReader(stream));
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public String nextLine() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    return br.readLine();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken("\n");
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

        @Override
        public void close() throws IOException {
            br.close();
        }
    }
}