#include <stdio.h>

int main(void)
{
 int N,M,A[1000],i,s,count;

  scanf("%d%d",&N,&M);

  for(i=1;i<=N;i++){
   scanf("%d",&A[i]);
 }
   s=0;
  for(i=1;i<=N;i++){
    s+=A[i];
  }

   count=0;
  for(i=1;i<=N;i++){
   if(A[i]>=s/(4*M))
      count++;
  }
   if(count>=M)
      printf("Yes\n");
   else
      printf("No\n");

   return 0;
 }
