import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {


		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner 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[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			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[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			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[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			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[] shohinArray = new int[n]; shohinArray new int[n] n for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			shohinArray[i] = sc.nextInt();
		} {
			shohinArray[i] = sc.nextInt();
		} shohinArray[i] = sc.nextInt() shohinArray[i] shohinArray i sc.nextInt() sc.nextInt sc int totalVote = 0; totalVote 0 for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			totalVote += shohinArray[i];
		} {
			totalVote += shohinArray[i];
		} totalVote += shohinArray[i] totalVote shohinArray[i] shohinArray i Arrays.sort(shohinArray) Arrays.sort Arrays shohinArray double rate = (shohinArray[n  -m] * 100000)/totalVote; rate (shohinArray[n  -m] * 100000)/totalVote (shohinArray[n  -m] * 100000) shohinArray[n  -m] shohinArray n  -m n m 100000 totalVote double base = 100000 / (4 * m); base 100000 / (4 * m) 100000 (4 * m) 4 m if(rate >= base ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} rate >= base rate base {
			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[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			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[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	}
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {


		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] shohinArray = new int[n];
		for(int i = 0;i < n;i++) {
			shohinArray[i] = sc.nextInt();
		}
		int totalVote = 0;
		for(int i = 0;i < n;i++) {
			totalVote += shohinArray[i];
		}
		Arrays.sort(shohinArray);
		double rate = (shohinArray[n  -m] * 100000)/totalVote;
		double base = 100000 / (4 * m);
		if(rate >= base ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	}
}