import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            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 in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    } main {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    } Scanner in=new Scanner(System.in); in new Scanner(System.in) int n=in.nextInt(); n in.nextInt() in.nextInt in int m=in.nextInt(); m in.nextInt() in.nextInt in int sum=0 sum 0 t_value=0 t_value 0 check=0; check 0 int ar[]=new int[n]; ar new int[n] n for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        } int i = 0; int i = 0; i 0 i <n i n i++ i++ i {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        } {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        } ar[i]=in.nextInt() ar[i] ar i in.nextInt() in.nextInt in sum=sum+ar[i] sum sum+ar[i] sum ar[i] ar i t_value=sum/(4*m) t_value sum/(4*m) sum (4*m) 4 m int count=0; count 0 for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        } int i = 0; int i = 0; i 0 i <n i n i++ i++ i {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        } {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        } if(ar[i]*(4*m) >= sum){
            count++;
        } ar[i]*(4*m) >= sum ar[i]*(4*m) ar[i] ar i (4*m) 4 m sum {
            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 in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    }
} public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int m=in.nextInt();
        int sum=0,t_value=0,check=0;
        int ar[]=new int[n];
        for (int i = 0; i <n; i++) {
            ar[i]=in.nextInt();
            sum=sum+ar[i];
        }
        t_value=sum/(4*m);
        int count=0;
        for (int i = 0; i <n; i++) {
                    if(ar[i]*(4*m) >= sum){
            count++;
        }
        }
        if(count>=m){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
    }
}