#include<stdio.h>
int main(void) {
  int goods_number, choose_number;
  int vote[1000];
  int i;
  int clear = 0;
  int sum = 0;
  int check;
  
  scanf("%d %d", &goods_number, &choose_number);
  for(i = 0; i < goods_number; i++) {
    scanf("%d", &vote[i]);
    sum += vote[i];
  }
  check = sum / (4 * choose_number);
  for(i = 0; i < goods_number; i++) {
    if(vote[i] > check) {
      clear++;
    }
  }
  if(clear >= choose_number){
    printf("Yes");
  }else{
    printf("No");
  }
  return 0;
}