import 'dart:io';

main(List<String> args){
  List nm = stdin.readLineSync().split(" ").map((n) => int.parse(n)).toList();
  int sum=0;
  List numbers = stdin.readLineSync().split(" ").map((n) => int.parse(n)).toList();
  for(int i in numbers){
    sum+=i;
  }
  int select=0;
  for(int i in numbers){
    if(i>=sum.toDouble()/(4*nm[1])){
      select++;
    }
  }
  if(select>=nm[1]){
    print("Yes");
  }else{
    print("No");
  }

}