import java.util.*;
class Main {
  public static void main(String []args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        System.out.println("Yes");
    }
    else {
        System.out.println("No");
    }
  }
} import java.util.*; util.* java class Main {
  public static void main(String []args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        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 k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        System.out.println("Yes");
    }
    else {
        System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        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 k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int sum = 0; sum 0 int[] arr = new int[n]; arr new int[n] n for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        arr[i] = sc.nextInt();
        sum += arr[i];
    } {
        arr[i] = sc.nextInt();
        sum += arr[i];
    } arr[i] = sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc sum += arr[i] sum arr[i] arr i double thres = (sum/(4.0*k)); thres (sum/(4.0*k)) sum (4.0*k) 4.0 k int c = 0; c 0 for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        if(arr[i] >= thres) {
            c++;
        }
    } {
        if(arr[i] >= thres) {
            c++;
        }
    } if(arr[i] >= thres) {
            c++;
        } arr[i] >= thres arr[i] arr i thres {
            c++;
        } c++ c if(c >= k) {
        System.out.println("Yes");
    }
    else {
        System.out.println("No");
    } c >= k c k {
        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
import java.util.*;
class Main {
  public static void main(String []args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        System.out.println("Yes");
    }
    else {
        System.out.println("No");
    }
  }
}