import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextInt();
    double sum = 0;
    int ans = 0;
    double x = (4 * M);
    int A[] = new int[N];
    for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    }
    double y = sum / x;
    for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    }

    if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextInt();
    double sum = 0;
    int ans = 0;
    double x = (4 * M);
    int A[] = new int[N];
    for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    }
    double y = sum / x;
    for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    }

    if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextInt();
    double sum = 0;
    int ans = 0;
    double x = (4 * M);
    int A[] = new int[N];
    for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    }
    double y = sum / x;
    for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    }

    if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextInt();
    double sum = 0;
    int ans = 0;
    double x = (4 * M);
    int A[] = new int[N];
    for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    }
    double y = sum / x;
    for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    }

    if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc double M = sc.nextInt(); M sc.nextInt() sc.nextInt sc double sum = 0; sum 0 int ans = 0; ans 0 double x = (4 * M); x (4 * M) 4 M int A[] = new int[N]; A new int[N] N for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    } {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum = sum + A[i] sum sum + A[i] sum A[i] A i double y = sum / x; y sum / x sum x for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      if (A[i] >= y) {
        ans++;
      }
    } {
      if (A[i] >= y) {
        ans++;
      }
    } if (A[i] >= y) {
        ans++;
      } A[i] >= y A[i] A i y {
        ans++;
      } ans++ ans if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } ans >= M ans 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
import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextInt();
    double sum = 0;
    int ans = 0;
    double x = (4 * M);
    int A[] = new int[N];
    for (int i = 0; i < N; i++) {
      A[i] = sc.nextInt();
      sum = sum + A[i];
    }
    double y = sum / x;
    for (int i = 0; i < N; i++) {
      if (A[i] >= y) {
        ans++;
      }
    }

    if (ans >= M) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
}