import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    }
} import java.util.Arrays; Arrays java.util import java.util.Collections; Collections java.util import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    } main {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) Integer N = scanner.nextInt(); N scanner.nextInt() scanner.nextInt scanner Integer M = scanner.nextInt(); M scanner.nextInt() scanner.nextInt scanner Integer[] inputList = new Integer[N]; inputList new Integer[N] N Integer sum = 0; sum 0 for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        } Integer i = 0; Integer i = 0; i 0 i < N i N i++ i++ i {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        } {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        } Integer vote = scanner.nextInt(); vote scanner.nextInt() scanner.nextInt scanner inputList[i] = vote inputList[i] inputList i vote sum += vote sum vote Arrays.sort(inputList, Collections.reverseOrder()) Arrays.sort Arrays inputList Collections.reverseOrder() Collections.reverseOrder Collections if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        } inputList[M - 1] * 4 * M >= sum inputList[M - 1] * 4 * M inputList[M - 1] * 4 * M inputList[M - 1] inputList M - 1 M 1 4 M sum {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.print("No");
        } System.out.print("No") System.out.print System.out System System.out "No" String[] args args public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    }
} public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    }
} Main
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("No");
        }
    }
}