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 num[] = new int[n];
        for(int i = 0; i < n;i++)
            num[i] = scan.nextInt();

        int sum = 0;
        for (int i=0; i<n; i++) {
            sum += num[i];
        }
      
        int cnt = 0;
        for (int i=0; i<n; i++) {
           if (num[i]*4*m >= sum) {
                cnt++;  
            }
        }
        if (cnt >= m) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    }
    
} 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 num[] = new int[n];
        for(int i = 0; i < n;i++)
            num[i] = scan.nextInt();

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

        int sum = 0;
        for (int i=0; i<n; i++) {
            sum += num[i];
        }
      
        int cnt = 0;
        for (int i=0; i<n; i++) {
           if (num[i]*4*m >= sum) {
                cnt++;  
            }
        }
        if (cnt >= m) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    } main {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int num[] = new int[n];
        for(int i = 0; i < n;i++)
            num[i] = scan.nextInt();

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

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

        int sum = 0;
        for (int i=0; i<n; i++) {
            sum += num[i];
        }
      
        int cnt = 0;
        for (int i=0; i<n; i++) {
           if (num[i]*4*m >= sum) {
                cnt++;  
            }
        }
        if (cnt >= m) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    }
    
} 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 num[] = new int[n];
        for(int i = 0; i < n;i++)
            num[i] = scan.nextInt();

        int sum = 0;
        for (int i=0; i<n; i++) {
            sum += num[i];
        }
      
        int cnt = 0;
        for (int i=0; i<n; i++) {
           if (num[i]*4*m >= sum) {
                cnt++;  
            }
        }
        if (cnt >= m) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    }
    
}