#include <stdio.h>
int main(void){
  int N, M;
  scanf("%d%d", &N, &M);
  int votes[N];
  int total=0;
  for (int i=0; i<N; ++i){
    scanf("%d", &votes[i]);
    total+=votes[i];}
  int par=total/(4*M);
  int count=0;
   for (int i=0; i<N; ++i){
     if (votes[i]>=par)
       ++count;}
  if (count>=M)
    printf("Yes");
  else
    printf("No");
  return 0;}
    