import java.util.*;
class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] vote = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    }
    double AVG = sum*(1d/(4*M));
    int cnt = 0;
    for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    }
    if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    }
  }
}
    
     import java.util.*; util.* java class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] vote = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    }
    double AVG = sum*(1d/(4*M));
    int cnt = 0;
    for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    }
    if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    }
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] vote = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    }
    double AVG = sum*(1d/(4*M));
    int cnt = 0;
    for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    }
    if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] vote = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    }
    double AVG = sum*(1d/(4*M));
    int cnt = 0;
    for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    }
    if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    }
  } 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 int[] vote = new int[N]; vote new int[N] N int sum = 0; sum 0 for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    } {
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    } int tmp = sc.nextInt(); tmp sc.nextInt() sc.nextInt sc vote[i] = tmp vote[i] vote i tmp sum += tmp sum tmp double AVG = sum*(1d/(4*M)); AVG sum*(1d/(4*M)) sum (1d/(4*M)) 1d (4*M) 4 M int cnt = 0; cnt 0 for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      if(vote[i] >= AVG){
        cnt++;
      }
    } {
      if(vote[i] >= AVG){
        cnt++;
      }
    } if(vote[i] >= AVG){
        cnt++;
      } vote[i] >= AVG vote[i] vote i AVG {
        cnt++;
      } cnt++ cnt if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    } cnt<M cnt M {
      System.out.print("No");
    } System.out.print("No") System.out.print System.out System System.out "No" {
      System.out.print("Yes");
    } System.out.print("Yes") System.out.print System.out System System.out "Yes" String[] args args
import java.util.*;
class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] vote = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++){
      int tmp = sc.nextInt();
      vote[i] = tmp;
      sum += tmp;
    }
    double AVG = sum*(1d/(4*M));
    int cnt = 0;
    for(int i=0; i<N; i++){
      if(vote[i] >= AVG){
        cnt++;
      }
    }
    if(cnt<M){
      System.out.print("No");
    }else{
      System.out.print("Yes");
    }
  }
}
    
    
