import java.util.*;
class Main {
  public static void main(String []args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();

    int sum = 0;
    int[] arr = new int[n];
    for(int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
        sum += arr[i];
    }
    double thres = (sum/(4.0*k));
    //System.out.println(thres);
    int c = 0;
    for(int i = 0; i < n; i++) {
        if(arr[i] >= thres) {
            c++;
        }
    }
    if(c >= k) {
        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