package ListArrays1506Exercise;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Problem5 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String[] inputString = scanner.nextLine().split("\\s+");
        String[] bombNumAndPower = scanner.nextLine().split("\\s+");
        int bombNum = Integer.parseInt(bombNumAndPower[0]);
        int bombPower = Integer.parseInt(bombNumAndPower[1]);

        ArrayList<Integer> input = new ArrayList<>();

        for (int i = 0; i < inputString.length; i++) {
            input.add(Integer.parseInt(inputString[i]));
        }

        ArrayList<Integer> store = new ArrayList<>();

        while (input.contains(bombNum)) {

            for (int i = 0; i < input.size(); i++) {

                if (input.get(i).equals(bombNum)) {

                    for (int j = 0; j < i - bombPower; j++) {
                        store.add(input.get(j));
                    }

                    for (int j = i + bombPower + 1; j < input.size(); j++) {
                        store.add(input.get(j));
                    }

                    input.clear();
                    for (Integer integer : store) {
                        input.add(integer);
                    }
                    store.clear();
                }
            }
        }
        int sum = 0;
        for (Integer integer : input) {
            sum += integer;
        }
        System.out.println(sum);
    }
}