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 sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  }
} 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 sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  } 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 sum = 0; sum 0 int[] a = new int[n]; a new int[n] n int p = 0; p 0 String ans = "No"; ans "No" for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      a[i] = sc.nextInt();
      sum += a[i];
    } {
      a[i] = sc.nextInt();
      sum += a[i];
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum += a[i] sum a[i] a i for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      if((a[i] * 4 * m) >= sum) p++;
    } {
      if((a[i] * 4 * m) >= sum) p++;
    } if((a[i] * 4 * m) >= sum) p++; (a[i] * 4 * m) >= sum (a[i] * 4 * m) a[i] * 4 * m a[i] a i 4 m sum p++ p if(p >= m) ans = "Yes"; p >= m p m ans = "Yes" ans "Yes" System.out.println(ans) System.out.println System.out System System.out ans 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 sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  }
} 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 sum = 0;
    int[] a = new int[n];
    int p = 0;
    String ans = "No";
    for(int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      sum += a[i];
    }
    for(int i = 0; i < n; i++) {
      if((a[i] * 4 * m) >= sum) p++;
    }
    if(p >= m) ans = "Yes";
    System.out.println(ans);
  }
}