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 cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    }
} 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 cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    }
} Main public static void main(String[] args){
        Scanner sc  = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    } main {
        Scanner sc  = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    } 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 cnt = 0; cnt 0 int all = 0; all 0 String flag = "No"; flag "No" int num[] = new int[n]; num new int[n] n double check = 0.0; check 0.0 for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        } {
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        } int vote = sc.nextInt(); vote sc.nextInt() sc.nextInt sc num[i] = vote num[i] num i vote all += vote all vote check = (double)all/(4*m) check (double)all/(4*m) (double)all (4*m) 4 m for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        } {
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        } if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            } num[i] >= check num[i] num i check { 
                cnt++;
                //System.out.println(num[i]);
            } cnt++ cnt if(cnt>=m){
            flag = "Yes";
        } cnt>=m cnt m {
            flag = "Yes";
        } flag = "Yes" flag "Yes" System.out.println(flag) System.out.println System.out System System.out flag 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 cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc  = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    }
} 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 cnt = 0;
        int all = 0;
        String flag = "No";
        int num[] = new int[n];
        double check = 0.0;
        //int x = 1;
        //System.out.println(x/2);

        for(int i = 0; i < n ; i++){
            int vote = sc.nextInt();
            num[i] = vote;
            all += vote;
            //System.out.println(num[i]);
        }
        //System.out.println(all);
        check = (double)all/(4*m);

        for(int i = 0; i < n; i++){
            if(num[i] >= check){ 
                cnt++;
                //System.out.println(num[i]);
            }
        }

        //System.out.println(cnt);
        if(cnt>=m){
            flag = "Yes";
        }
        System.out.println(flag);
    }
}