import 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();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz