#include <stdio.h>
 
int main(){
  int n, m;
  scanf("%d %d", &n, &m);
  int a[n];
  int i;
  int sum;
  sum = 0;
  for(i = 0; i < n; i++){
    scanf("%d", &a[n]);
    sum += a[n];
  }
  int number;
  for(i = 0; i < n; i++){
    if (a[i] >= (sum / (4 * m))){
      number++;
    }
  }
  if (number >= m)
    printf("Yes");
  else
    printf("No");
}