//package cf;

import java.util.*;
import java.io.*;
class Main {
    public static void main(String[] args) throws IOException {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "No");
    }
}
 import java.util.*; util.* java import java.io.*; io.* java class Main {
    public static void main(String[] args) throws IOException {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "No");
    }
} Main public static void main(String[] args) throws IOException {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "No");
    } main {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "No");
    } Scanner io = new Scanner(System.in); io new Scanner(System.in) int n = io.nextInt() n io.nextInt() io.nextInt io m = io.nextInt(); m io.nextInt() io.nextInt io int c = 0 c 0 s = 0; s 0 int[] arr = new int[n]; arr new int[n] n for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt()); int i = 0; int i = 0; i 0 i < n i n i++ i++ i s += (arr[i] = io.nextInt()); s += (arr[i] = io.nextInt()) s (arr[i] = io.nextInt()) arr[i] arr i io.nextInt() io.nextInt io for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++; int i = 0; int i = 0; i 0 i < n i n i++ i++ i if((double)arr[i] >= (double)s/4/m) c++; if((double)arr[i] >= (double)s/4/m) c++; (double)arr[i] >= (double)s/4/m (double)arr[i] arr i (double)s/4/m (double)s/4/m (double)s 4 m c++ c System.out.println(c >= m ? "Yes" : "No") System.out.println System.out System System.out c >= m ? "Yes" : "No" c >= m c m "Yes" "No" String[] args args
//package cf;

import java.util.*;
import java.io.*;
class Main {
    public static void main(String[] args) throws IOException {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "No");
    }
}

