#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define ll long long

int main(){
  int n,m;
  scanf("%d%d",&n,&m);
  int ans=0;
  int a[n];
  int sum=0;
  for(int i=0;i<n;i++){
    scanf("%d",&a[i]);
    sum+=a[i];}
  double sikii = sum*1.0/4/m;
  for(int i=0;i<n;i++){
    if(sikii<=a[i]) ans++;}

  if(ans>=m) printf("Yes\n");
  else printf("No\n");



  return 0;
}
