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

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M=sc.nextInt();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            System.out.println("Yes");
        else{
            System.out.println("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 sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M=sc.nextInt();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            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();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            System.out.println("Yes");
        else{
            System.out.println("No");
        }
    } main {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M=sc.nextInt();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            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 float sum=0; sum 0 Integer[] arr=new Integer[N]; arr new Integer[N] N for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        } {
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        } arr[i]=sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc sum=sum+arr[i] sum sum+arr[i] sum arr[i] arr i int flag=1; flag 1 Arrays.sort(arr, Collections.reverseOrder()) Arrays.sort Arrays arr Collections.reverseOrder() Collections.reverseOrder Collections Float l=(sum/(4*M)); l (sum/(4*M)) sum (4*M) 4 M for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        } int i=0; int i=0; i 0 i<M i M i++ i++ i {
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        } {
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        } if(arr[i] < l){
                flag=0;
                break;
            } arr[i] < l arr[i] arr i l {
                flag=0;
                break;
            } flag=0 flag 0 break; if (flag==1)
            System.out.println("Yes");
        else{
            System.out.println("No");
        } flag==1 flag 1 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();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            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();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            System.out.println("Yes");
        else{
            System.out.println("No");
        }
    }
} Main
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M=sc.nextInt();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            System.out.println("Yes");
        else{
            System.out.println("No");
        }
    }
}
