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