import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main {
  public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.IOException; IOException java.io public class Main {
  public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  }
} Main public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  } main {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  } BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); in new BufferedReader(new InputStreamReader(System.in)) String[] str = in.readLine().split(" "); str in.readLine().split(" ") in.readLine().split in.readLine() in.readLine in " " String[] a_str = in.readLine().split(" "); a_str in.readLine().split(" ") in.readLine().split in.readLine() in.readLine in " " int n = Integer.parseInt(str[0]); n Integer.parseInt(str[0]) Integer.parseInt Integer str[0] str 0 int m = Integer.parseInt(str[1]); m Integer.parseInt(str[1]) Integer.parseInt Integer str[1] str 1 int[] a = new int[n]; a new int[n] n int sum = 0; sum 0 int count = 0; count 0 for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    } {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    } a[i] = Integer.parseInt(a_str[i]) a[i] a i Integer.parseInt(a_str[i]) Integer.parseInt Integer a_str[i] a_str i sum += a[i] sum a[i] a i for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    } {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    } if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      } (double)a[i] < (double)sum/(4*m) (double)a[i] a i (double)sum/(4*m) (double)sum (4*m) 4 m {
        count += 1;
      } count += 1 count 1 System.out.println(n-count>=m?"Yes":"No") System.out.println System.out System System.out n-count>=m?"Yes":"No" n-count>=m n-count n count m "Yes" "No" String[] args args public class Main {
  public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  }
} public class Main {
  public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  }
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main {
  public static void main(String[] args) throws IOException{
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] str = in.readLine().split(" ");
    String[] a_str = in.readLine().split(" ");
    int n = Integer.parseInt(str[0]);
    int m = Integer.parseInt(str[1]);
    int[] a = new int[n];
    int sum = 0;
    int count = 0;

    for(int i = 0; i < n; i++) {
      a[i] = Integer.parseInt(a_str[i]);
      sum += a[i];
    }

    for(int i = 0; i < n; i++) {
      if((double)a[i] < (double)sum/(4*m)){
        count += 1;
      }
    }
    System.out.println(n-count>=m?"Yes":"No");
  }
}
