import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    }
} Main public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    } main {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"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[] ary = new int[n]; ary new int[n] n long sum = 0; sum 0 for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        } {
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        } ary[i] = sc.nextInt() ary[i] ary i sc.nextInt() sc.nextInt sc sum += ary[i] sum ary[i] ary i sc.close() sc.close sc int m2 = 0; m2 0 for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        } {
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        } if(ary[i]*(4*m) >= sum){
        		m2++;
        	} ary[i]*(4*m) >= sum ary[i]*(4*m) ary[i] ary i (4*m) 4 m sum {
        		m2++;
        	} m2++ m2 System.out.println(m2>=m?"Yes":"No") System.out.println System.out System System.out m2>=m?"Yes":"No" m2>=m m2 m "Yes" "No" String[] args args public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    }
} public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] ary = new int[n];
        long sum = 0;
        for(int i = 0;i < n; i++){
        	ary[i] = sc.nextInt();
        	sum += ary[i];
        }
        sc.close();
        int m2 = 0;
        for(int i = 0;i < n; i++){
        	if(ary[i]*(4*m) >= sum){
        		m2++;
        	}
        }
        System.out.println(m2>=m?"Yes":"No");

    }
}