#include <stdio.h>
#include <stdlib.h>

int main(void) {
  int n, m;
  int *a;
  int sum = 0;
  int count = 0;

  scanf("%d %d", &n, &m);

  a = calloc(n, sizeof(int));

  for (int i = 0; i < n; i++) {
    scanf("%d", &a[i]);
    sum += a[i];
  }

  for (int i = 0; i < n; i++) {
    if ((sum / (4 * m)) < a[i])
      count++;
  }

  if (count >= m)
    puts("Yes");
  else 
    puts("No");
  free(a);

  return  0;
}