import java.util.Scanner;
class Main{
  public static void main(String[] args){
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} import java.util.Scanner; Scanner java.util class Main{
  public static void main(String[] args){
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main public static void main(String[] args){
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int N = stdIn.nextInt(); N stdIn.nextInt() stdIn.nextInt stdIn double M = stdIn.nextDouble(); M stdIn.nextDouble() stdIn.nextDouble stdIn Double X = 4*M; X 4*M 4 M Double Y = 1/X; Y 1/X 1 X int[] s = new int[N]; s new int[N] N for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    } int i = 0; int i = 0; i 0 i<N i N i++ i++ i {
      s[i] = stdIn.nextInt();
    } {
      s[i] = stdIn.nextInt();
    } s[i] = stdIn.nextInt() s[i] s i stdIn.nextInt() stdIn.nextInt stdIn int G = 0; G 0 for(int i = 0; i<N; i++){
      G += s[i];
    } int i = 0; int i = 0; i 0 i<N i N i++ i++ i {
      G += s[i];
    } {
      G += s[i];
    } G += s[i] G s[i] s i int Sum = 0; Sum 0 for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    } int i = 0; int i = 0; i 0 i<N i N i++ i++ i {
      if(s[i]>=G*Y){
        Sum += 1;
      }
    } {
      if(s[i]>=G*Y){
        Sum += 1;
      }
    } if(s[i]>=G*Y){
        Sum += 1;
      } s[i]>=G*Y s[i] s i G*Y G Y {
        Sum += 1;
      } Sum += 1 Sum 1 if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } Sum >= M Sum 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.Scanner;
class Main{
  public static void main(String[] args){
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}