import java.util.*;

public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	}
} import java.util.*; util.* java public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	}
} Main public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	} main {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	} Scanner keyboard = new Scanner(System.in); keyboard new Scanner(System.in) int N = keyboard.nextInt(); N keyboard.nextInt() keyboard.nextInt keyboard int M = keyboard.nextInt(); M keyboard.nextInt() keyboard.nextInt keyboard int[] A= new int[N]; A new int[N] N int sum = 0; sum 0 for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		} {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		} int a = keyboard.nextInt(); a keyboard.nextInt() keyboard.nextInt keyboard sum += a sum a A[i] = a*4*M A[i] A i a*4*M a*4*M a 4 M int count = 0; count 0 for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		} int j=0; int j=0; j 0 j<N j N j++ j++ j {
			if(A[j]>=sum) {
				count++;
			}
		} {
			if(A[j]>=sum) {
				count++;
			}
		} if(A[j]>=sum) {
				count++;
			} A[j]>=sum A[j] A j sum {
				count++;
			} count++ count if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} count >= M count 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" keyboard.close() keyboard.close keyboard String[] args args public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	}
} public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	}
} Main
import java.util.*;

public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N = keyboard.nextInt();
		int M = keyboard.nextInt();
		int[] A= new int[N];
		int sum = 0;
		
		for(int i=0; i<N;i++) {
			int a = keyboard.nextInt();
			sum += a;
			A[i] = a*4*M;
		}
		
		int count = 0;
		for(int j=0; j<N;j++) {
			if(A[j]>=sum) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

		keyboard.close();	
		
	}
}