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

public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
} Main public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  } main {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int N = scan.nextInt(); N scan.nextInt() scan.nextInt scan int M = scan.nextInt(); M scan.nextInt() scan.nextInt scan int A[] = new int[N]; A new int[N] N int sum = 0; sum 0 for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      A[i] = scan.nextInt();
      sum += A[i];
    } {
      A[i] = scan.nextInt();
      sum += A[i];
    } A[i] = scan.nextInt() A[i] A i scan.nextInt() scan.nextInt scan sum += A[i] sum A[i] A i scan.close() scan.close scan Arrays.sort(A) Arrays.sort Arrays A if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    } (double)A[N-M]/sum < (double)1/(4*M) (double)A[N-M]/sum (double)A[N-M] A N-M N M sum (double)1/(4*M) (double)1 (4*M) 4 M {
      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 scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
} public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
} Main
import java.util.Scanner;
import java.util.Arrays;

public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
}