import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	}
	
} import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	}
	
} Main public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	} main {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) int N = in.nextInt(); N in.nextInt() in.nextInt in int M = in.nextInt(); M in.nextInt() in.nextInt in int[] itemVotes = new int[N]; itemVotes new int[N] N int sum = 0; sum 0 int count = 0; count 0 for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		} {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		} itemVotes[i] = in.nextInt() itemVotes[i] itemVotes i in.nextInt() in.nextInt in sum = sum + itemVotes[i] sum sum + itemVotes[i] sum itemVotes[i] itemVotes i float cutoff = (1/(4* (float) M))*(float) sum; cutoff (1/(4* (float) M))*(float) sum (1/(4* (float) M)) 1 (4* (float) M) 4 (float) M (float) sum Arrays.sort(itemVotes) Arrays.sort Arrays itemVotes for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i<N i N i++ i++ i {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		} {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		} if(itemVotes[i] >= cutoff) {
				count++;
			} itemVotes[i] >= cutoff itemVotes[i] itemVotes i cutoff {
				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" String[] args args public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	}
	
} public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	}
	
} Main
import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int N = in.nextInt();
		int M = in.nextInt();
		int[] itemVotes = new int[N];
		int sum = 0;
		int count = 0;
		for (int i = 0; i < N; i++) {
			itemVotes[i] = in.nextInt();
			sum = sum + itemVotes[i];
		}
		
		float cutoff = (1/(4* (float) M))*(float) sum;
		Arrays.sort(itemVotes);
		
		for(int i = 0; i<N; i++) {
			if(itemVotes[i] >= cutoff) {
				count++;
			}
		}
		
		if(count >= M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		
	}
	
}
