#include <stdio.h>

int main()
{
  int n;
  int m;
  int a[1000];
  int ok = 0;
  int i; 
  int good = 0;
  
  scanf("%d %d", &n, &m);
  
  for(i=0; i<n; i++) {
    scanf("%d", &a[i]);
    ok += a[i];
  }
  
  ok = ok / (4 * m);
  
  for (i=0; i<n; i++) {
    if(a[i] >= ok)
      good++;
  }
  
  if (good >= m)
    printf("Yes");
  
  else
    printf("No");
  
  return 0;
}