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 count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        count++;
      }
    }
    
    if(count >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
}
} 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 count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[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 sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        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 count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        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 count = 0; count 0 int sum = 0; sum 0 Integer a[] = new Integer[N]; a new Integer[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 Arrays.sort(a, Comparator.reverseOrder()) Arrays.sort Arrays a Comparator.reverseOrder() Comparator.reverseOrder Comparator for (int i = 0; i < N; i++){
     sum += a[i];
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
     sum += a[i];
    } {
     sum += a[i];
    } sum += a[i] sum a[i] a i for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        count++;
      }
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      if(a[i]*4*M >= sum){
        count++;
      }
    } {
      if(a[i]*4*M >= sum){
        count++;
      }
    } if(a[i]*4*M >= sum){
        count++;
      } a[i]*4*M >= sum a[i]*4*M a[i]*4*M a[i] a i 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 sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[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 sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        count++;
      }
    }
    
    if(count >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
}
} 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 count = 0;
    int sum = 0;

    Integer a[] = new Integer[N];
    for(int i = 0; i < N; i++){
      a[i] = sc.nextInt();      
    }
    Arrays.sort(a, Comparator.reverseOrder());
    
    for (int i = 0; i < N; i++){
     sum += a[i];
    }

    for (int i = 0; i < N; i++){
      if(a[i]*4*M >= sum){
        count++;
      }
    }
    
    if(count >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
}
}
