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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  }
} 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  }
} 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  } 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  } 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 cnt = 0; cnt 0 for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++; int i = 0; int i = 0; i 0 i < N i N i++ i++ i if (A[i] * M * 4 >= sum) cnt++; if (A[i] * M * 4 >= sum) cnt++; A[i] * M * 4 >= sum A[i] * M * 4 A[i] * M * 4 A[i] A i M 4 sum 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 System.out System System.out "Yes" 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 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  }
} 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  }
} 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 cnt = 0;
    for (int i = 0; i < N; i++) if (A[i] * M * 4 >= sum) cnt++;
    if (cnt >= M) System.out.println("Yes");
    else System.out.println("No");
  }
}
