#include <stdio.h>
int main(void){
  int n,m;
  int a[1000];
  int i;
  int sum=0;
  count=0;
  
  scanf("%d %d",&n,&m);
  for(i=0;i<n;i++){
    scanf("%d ",&a[i]);
    sum=sum+a[i];
    if(a[i]<sum/(4*m))
      count++;
  }
  
  if(count>=m)
    puts("Yes");
  else 
    puts("No");
  
  return 0;
}
  
  