import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	} main {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int[] a = new int[n]; a new int[n] n double total = 0; total 0 for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			a[i] = scan.nextInt();
			total += a[i];
		} {
			a[i] = scan.nextInt();
			total += a[i];
		} a[i] = scan.nextInt() a[i] a i scan.nextInt() scan.nextInt scan total += a[i] total a[i] a i int ans = 0; ans 0 for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		} int j = 0; int j = 0; j 0 j < n j n j++ j++ j {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		} {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		} if(a[j] >= total / (4*m)) {
				ans++;
			} a[j] >= total / (4*m) a[j] a j total / (4*m) total (4*m) 4 m {
				ans++;
			} ans++ ans if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} ans >= m ans m {
			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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int[] a = new int[n];
		double total = 0;
		
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
			total += a[i];
		}
		
		int ans = 0;
		
		for(int j = 0; j < n; j++) {
			if(a[j] >= total / (4*m)) {
				ans++;
			}
		}
		
		if(ans >= m) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}

}
