import 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
}  import java.util.*; util.* java 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } 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 for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            A[i] = sc.nextInt();
        } {
            A[i] = sc.nextInt();
        } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc int sum = 0; sum 0 for(int i = 0; i < N; i++){
            sum = sum + A[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            sum = sum + A[i];
        } {
            sum = sum + A[i];
        } sum = sum + A[i] sum sum + A[i] sum A[i] A i Arrays.sort(A) Arrays.sort Arrays A double c = (double)sum/(4*M); c (double)sum/(4*M) (double)sum (4*M) 4 M if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        } A[N-M] < c A[N-M] A N-M N M c {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} Main
import 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];
        for(int i = 0; i < N; i++){
            A[i] = sc.nextInt();
        }
        int sum = 0;
        for(int i = 0; i < N; i++){
            sum = sum + A[i];
        }
        Arrays.sort(A);
        double c = (double)sum/(4*M);
        if(A[N-M] < c){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} 