import java.util.Scanner;

/**
 * Main
 */
public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int M = sc.nextInt(); M sc.nextInt() sc.nextInt sc int[] A = new int[N]; A new int[N] N int total = 0; total 0 for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            A[i] = sc.nextInt();
            total += A[i];
        } {
            A[i] = sc.nextInt();
            total += A[i];
        } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc total += A[i] total A[i] A i sc.close() sc.close sc double standard = 1/(4 * (double)(M)); standard 1/(4 * (double)(M)) 1 (4 * (double)(M)) 4 (double)(M) int count = 0; count 0 for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        } int i = 0; int i = 0; i 0 i<N i N i++ i++ i {
            if((double)(A[i]) >= total * standard){
                count++;
            }
        } {
            if((double)(A[i]) >= total * standard){
                count++;
            }
        } if((double)(A[i]) >= total * standard){
                count++;
            } (double)(A[i]) >= total * standard (double)(A[i]) A i total * standard total standard {
                count++;
            } count++ count if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } count >= M count M {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    }
} Main
import java.util.Scanner;

/**
 * Main
 */
public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int total = 0;

        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
            total += A[i];
        }
        sc.close();

        double standard = 1/(4 * (double)(M));
        int count = 0;

        for(int i = 0; i<N; i++){
            if((double)(A[i]) >= total * standard){
                count++;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

    }
}