
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }


    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }


    }
} Main public static void main(String[] args) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            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 Arrays.sort(A) Arrays.sort Arrays A if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } A[N-M]*4*M>=total A[N-M]*4*M A[N-M]*4*M A[N-M] A N-M N M 4 M total {
            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) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }


    }
} public class Main {
    public static void main(String[] args) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }


    }
} Main

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        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];
        }
        Arrays.sort(A);
        if(A[N-M]*4*M>=total){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }


    }
}