import java.util.Scanner;

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

        scanner.close();
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int N = scanner.nextInt(); N scanner.nextInt() scanner.nextInt scanner int M = scanner.nextInt(); M scanner.nextInt() scanner.nextInt scanner int[] a = new int[N]; a new int[N] N int sum = 0; sum 0 for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            a[i] = scanner.nextInt();
            sum += a[i];
        } {
            a[i] = scanner.nextInt();
            sum += a[i];
        } a[i] = scanner.nextInt() a[i] a i scanner.nextInt() scanner.nextInt scanner sum += a[i] sum a[i] a i int count = 0; count 0 for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        } {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        } if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            } a[i] / (double) sum >= 1 / (4.0 * M) a[i] / (double) sum a[i] a i (double) sum 1 / (4.0 * M) 1 (4.0 * M) 4.0 M {
                count++;
            } count++ count System.out.print(count >= M ? "Yes" : "No") System.out.print System.out System System.out count >= M ? "Yes" : "No" count >= M count M "Yes" "No" scanner.close() scanner.close scanner String args[] args public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

        scanner.close();
    }
} Main
import java.util.Scanner;

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

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] a = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            a[i] = scanner.nextInt();
            sum += a[i];
        }

        int count = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] / (double) sum >= 1 / (4.0 * M)) {
                count++;
            }
        }
        

        System.out.print(count >= M ? "Yes" : "No");

        scanner.close();
    }
}