import java.util.*;
class Main{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"Yes");
    }
} import java.util.*; util.* java class Main{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"Yes");
    }
} Main public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"Yes");
    } main {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"Yes");
    } Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int n=sc.nextInt() n sc.nextInt() sc.nextInt sc m=sc.nextInt(); m sc.nextInt() sc.nextInt sc int sum=0; sum 0 int []a=new int[n]; a new int[n] n for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            a[i]=sc.nextInt();
            sum+=a[i];
        } {
            a[i]=sc.nextInt();
            sum+=a[i];
        } a[i]=sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum+=a[i] sum a[i] a i int ans=0; ans 0 for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        } {
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        } if(!(4*m*a[i]<sum)){
                ans++;
            } !(4*m*a[i]<sum) (4*m*a[i]<sum) 4*m*a[i] 4*m*a[i] 4 m a[i] a i sum {
                ans++;
            } ans++ ans System.out.println(ans<m?"No":"Yes") System.out.println System.out System System.out ans<m?"No":"Yes" ans<m ans m "No" "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(),m=sc.nextInt();
        int sum=0;
        int []a=new int[n];
        for(int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans=0;
        for(int i=0;i<n;i++){
            if(!(4*m*a[i]<sum)){
                ans++;
            }
        }
        System.out.println(ans<m?"No":"Yes");
    }
}