#include<stdio.h>
int main(void)
{
  N, M = map(int,input().split()) 
 A = list(map(int,input().split())) 
 S = sum(A) 
 cnt = 0 
   for a in A; 
   if a >= S / (4*M); 
     cnt += 1 
   if cnt >= M:;
      print("Yes") 
   else  print("No")
return 0;
}