import java.util.Scanner;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		int voteSum = 0;

		for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		}

		for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		}

		if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}
	}
} import java.util.Scanner; Scanner java.util class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		int voteSum = 0;

		for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		}

		for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		}

		if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		int voteSum = 0;

		for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		}

		for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		}

		if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		int voteSum = 0;

		for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		}

		for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		}

		if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}
	} 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[] a = new int[n]; a new int[n] n int voteSum = 0; voteSum 0 for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			a[i] = sc.nextInt();
			voteSum += a[i];
		} {
			a[i] = sc.nextInt();
			voteSum += a[i];
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc voteSum += a[i] voteSum a[i] a i for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		} int i = 0; int i = 0; i 0 i < n-1 i n-1 n 1 i++ i++ i {
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		} {
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		} for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			} int j = i + 1; int j = i + 1; j i + 1 i 1 j < n j n j++ j++ j {
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			} {
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			} if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				} a[i] < a[j] a[i] a i a[j] a j {
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				} int box = a[i]; box a[i] a i a[i] = a[j] a[i] a i a[j] a j a[j] = box a[j] a j box if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		} a[m - 1] < ((double)voteSum/(4 * (double)m)) a[m - 1] a m - 1 m 1 ((double)voteSum/(4 * (double)m)) (double)voteSum (4 * (double)m) 4 (double)m {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args
import java.util.Scanner;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		int voteSum = 0;

		for(int i = 0; i < n; i++){
			a[i] = sc.nextInt();
			voteSum += a[i];
		}

		for(int i = 0; i < n-1; i++){
			for(int j = i + 1; j < n; j++){
				if(a[i] < a[j]){
					int box = a[i];
					a[i] = a[j];
					a[j] = box;
				}
			}
		}

		if(a[m - 1] < ((double)voteSum/(4 * (double)m))){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}
	}
}