import java.util.Scanner;
import java.util.Arrays;

public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int N = scan.nextInt();
    int M = scan.nextInt();
    int A[] = new int[N];
    int sum = 0;
    for(int i=0; i<N; i++) {
      A[i] = scan.nextInt();
      sum += A[i];
    }
    scan.close();

    Arrays.sort(A);

    if((double)A[N-M]/sum < (double)1/(4*M)) {
      System.out.println("No");
    }
    else {
      System.out.println("Yes");
    }
  }
}
/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