import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    }
} Main public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    } main {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt() n scan.nextInt() scan.nextInt scan m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int a[] = new int[n]; a new int[n] n int sum sum count; count sum = 0 sum 0 for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        } int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
            a[i] = scan.nextInt();
            sum += a[i];
        } {
            a[i] = scan.nextInt();
            sum += a[i];
        } a[i] = scan.nextInt() a[i] a i scan.nextInt() scan.nextInt scan sum += a[i] sum a[i] a i count = 0 count 0 for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        } {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        } if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            } !(a[i] < sum / (double)(4 * m)) (a[i] < sum / (double)(4 * m)) a[i] a i sum / (double)(4 * m) sum (double)(4 * m) 4 m {
                count++;
            } count++ count if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            } count == m count m {
                System.out.println("Yes");
                scan.close();
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" scan.close() scan.close scan return; System.out.println("No") System.out.println System.out System System.out "No" scan.close() scan.close scan return; String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = scan.nextInt(), m = scan.nextInt();
        int a[] = new int[n];
        int sum, count;

        sum = 0;
        for(int i = 0; i < a.length; i++) {
            a[i] = scan.nextInt();
            sum += a[i];
        }
        
        count = 0;
        for(int i = 0; i < n; i++) {
            if(!(a[i] < sum / (double)(4 * m))) {
                count++;
            }

            if(count == m) {
                System.out.println("Yes");
                scan.close();
                return;
            }
        }
        System.out.println("No");

        scan.close();
        return;
    }
}