#include <stdio.h>

int main (void)
{
  unsigned long a[100];
  unsigned long n, m, mi;
  unsigned long i;
  unsigned long sum = 0;
  
  scanf("%lu %lu", &n, &m);
  mi=0;
  
  for (i=0; i<n; i++) {
    scanf("%lu", &(a[i]));
    sum += a[i];
  }
          
  for (i=0; i<n; i++) {
    if (double(a[i]) >= double(sum/(4*m))) {
      mi++;
    }
  }
  
  if (mi >= m) {
    puts("Yes");
  } else {
    puts("No");
  }
          
  return 0;

}
