import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    }
} import java.util.Scanner; Scanner 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();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    } 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 double t = 0; t 0 double[] arr = new double[n]; arr new double[n] n for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            arr[i] = sc.nextDouble();
            t += arr[i];
        } {
            arr[i] = sc.nextDouble();
            t += arr[i];
        } arr[i] = sc.nextDouble() arr[i] arr i sc.nextDouble() sc.nextDouble sc t += arr[i] t arr[i] arr i double rate = t / (4 * m); rate t / (4 * m) t (4 * m) 4 m int c = 0; c 0 for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if (arr[i] >= rate) {
                c++;
            }
        } {
            if (arr[i] >= rate) {
                c++;
            }
        } if (arr[i] >= rate) {
                c++;
            } arr[i] >= rate arr[i] arr i rate {
                c++;
            } c++ c System.out.println(c >= m ? "Yes" : "No") System.out.println System.out System System.out c >= m ? "Yes" : "No" c >= m c m "Yes" "No" 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();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        double t = 0;
        double[] arr = new double[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextDouble();
            t += arr[i];
        }
        double rate = t / (4 * m);
        int c = 0;
        for (int i = 0; i < n; i++) {
            if (arr[i] >= rate) {
                c++;
            }
        }
        System.out.println(c >= m ? "Yes" : "No");
    }
}