import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  }
} Main public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  } main {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  } Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in))); in new Scanner(new BufferedReader(new InputStreamReader(System.in))) int n = in.nextInt(); n in.nextInt() in.nextInt in int m = in.nextInt(); m in.nextInt() in.nextInt in int[] a = new int[n]; a new int[n] n double sum = 0; sum 0 for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    } int i = 0; int i = 0; i 0 i < n i n ++i ++i i {
      a[i] = in.nextInt();
      sum += a[i];
    } {
      a[i] = in.nextInt();
      sum += a[i];
    } a[i] = in.nextInt() a[i] a i in.nextInt() in.nextInt in sum += a[i] sum a[i] a i Arrays.sort(a) Arrays.sort Arrays a double threshold = sum / (4 * (double)m); threshold sum / (4 * (double)m) sum (4 * (double)m) 4 (double)m int idx = n - m; idx n - m n m if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes"); (double)a[idx] < threshold (double)a[idx] a idx threshold System.out.println("No") System.out.println System.out System System.out "No" 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) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  }
} public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) throws IOException {
    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
    int n = in.nextInt();
    int m = in.nextInt();
    int[] a = new int[n];
    double sum = 0;
    for (int i = 0; i < n; ++i) {
      a[i] = in.nextInt();
      sum += a[i];
    }
    Arrays.sort(a);
    double threshold = sum / (4 * (double)m);
    int idx = n - m;
    if ((double)a[idx] < threshold) System.out.println("No");
    else System.out.println("Yes");
  }
}
