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();
		Integer[] A = new Integer [N];
		int count;
		String ans;
		int sumA = 0;
		for (int i = 0; i < N; i++) {
			int a = sc.nextInt();
			A[i] = a;
			sumA += a;
		}
		Arrays.sort(A,Collections.reverseOrder());
		if (A[M-1] >= ((double)(double)sumA/(4*(double)M))) {
      ans = "Yes";
		} else {
			ans = "No";
		}
		System.out.println(ans);
  }
}
/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