# include<stdio.h>

int main (void)
{
  int n,m,i,sum=0,t=0;
  int s[100];
  
  scanf("%d %d", &n,&m);
  
  for(i=0;i<n;i++){
    scanf("%d", &s[i]);
    sum+=s[i];
  }
  
  for(i=0;i<n;i++){
    if(s[i]>sum/(4*m))
      t++;
  }
  
  if(t>=m)
    printf("Yes\n");
  else
    printf("No\n");
  
  return 0;
  
}