import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);

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

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

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

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

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

    int x= 0;
    int N = scan.nextInt();
    int M = scan.nextInt();
    int souhyou = 0;
    int syouhin[] = new int[N];
    for(int i = 0;i<N;i++){
      syouhin[i] = scan.nextInt();
      souhyou += syouhin[i];
    }
    double zyouken = 0;
    zyouken = (double)souhyou/(4*M);
//System.out.println(zyouken);
    for(int i = 0;i < N;i++){
      if(syouhin[i] >= zyouken){
        x++;
      }
    }
    if(x >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);

    int x= 0;
    int N = scan.nextInt();
    int M = scan.nextInt();
    int souhyou = 0;
    int syouhin[] = new int[N];
    for(int i = 0;i<N;i++){
      syouhin[i] = scan.nextInt();
      souhyou += syouhin[i];
    }
    double zyouken = 0;
    zyouken = (double)souhyou/(4*M);
//System.out.println(zyouken);
    for(int i = 0;i < N;i++){
      if(syouhin[i] >= zyouken){
        x++;
      }
    }
    if(x >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}
