import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  }
} Main public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  } main {
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  } 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 int[] A=new int[N]; A new int[N] N int counter=0; counter 0 double total=0; total 0 for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      A[i]=sc.nextInt();
      total+=A[i];
    } {
      A[i]=sc.nextInt();
      total+=A[i];
    } A[i]=sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc total+=A[i] total A[i] A i double cap=total/(4.0*M); cap total/(4.0*M) total (4.0*M) 4.0 M for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      if(A[i]>=cap) counter++;
    } {
      if(A[i]>=cap) counter++;
    } if(A[i]>=cap) counter++; A[i]>=cap A[i] A i cap counter++ counter if(counter<M) System.out.println("No");
    else System.out.println("Yes"); counter<M counter M System.out.println("No") System.out.println System.out System System.out "No" System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  }
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    double M=sc.nextInt();
    int[] A=new int[N];
    int counter=0;
    double total=0;
    for(int i=0;i<N;i++){
      A[i]=sc.nextInt();
      total+=A[i];
    }
    double cap=total/(4.0*M);
    for(int i=0;i<N;i++){
      if(A[i]>=cap) counter++;
    }
    if(counter<M) System.out.println("No");
    else System.out.println("Yes");
  }
}