import java.io.*;
import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
    public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    }
} Main public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    } main {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    } Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in))); in new Scanner(new BufferedReader(new InputStreamReader(System.in))) int t = 1; t 1 int n = in.nextInt(); n in.nextInt() in.nextInt in int m = in.nextInt(); m in.nextInt() in.nextInt in int a[] = new int[n]; a new int[n] n int x = 0 x 0 cnt=0 cnt 0 sum=0; sum 0 for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            a[i] = in.nextInt();
            sum+=a[i];
        } {
            a[i] = in.nextInt();
            sum+=a[i];
        } a[i] = in.nextInt() a[i] a i in.nextInt() in.nextInt in sum+=a[i] sum a[i] a i x = (int)Math.ceil(sum/(1.0*4*m)) x (int)Math.ceil(sum/(1.0*4*m)) Math.ceil Math sum/(1.0*4*m) sum (1.0*4*m) 1.0*4*m 1.0 4 m for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            if(a[i]>=x) cnt++;
        } {
            if(a[i]>=x) cnt++;
        } if(a[i]>=x) cnt++; a[i]>=x a[i] a i x cnt++ cnt System.out.println(cnt>=m?"Yes":"No") System.out.println System.out System System.out cnt>=m?"Yes":"No" cnt>=m cnt m "Yes" "No" String args[] args public class Main {
    public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    }
} public class Main {
    public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    }
} Main
import java.io.*;
import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int t = 1;
        int n = in.nextInt();
        int m = in.nextInt();
        int a[] = new int[n];
        int x = 0,cnt=0,sum=0;
        for(int i=0;i<n;i++){
            a[i] = in.nextInt();
            sum+=a[i];
        }
        
        x = (int)Math.ceil(sum/(1.0*4*m));
        for(int i=0;i<n;i++){
            if(a[i]>=x) cnt++;
        }
        System.out.println(cnt>=m?"Yes":"No");
    }
}