#include <stdio.h>

int main(void)
{
  int n,i,m,count;
  double sum = 0;
  double f;
  scanf("%d %d",&n,&m);
  int a[n];
  int max[m];
  for(i=0;i<n;i++)
  {
    scanf("%d",&a[i]);
    sum = sum + a[i];
  }
  f = sum/(4*m);
  for(i=0;i<n;i++)
  {
    if(a[i] >= f)
      count++;
  }  
  if(count >= (double)m){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }

  return 0;
}
