#include<stdio.h>
int main(void){
  int n,m,sum=0,ans=0;
  double sou,s;
  scanf("%d%d",&n,&m);
  int a[n],i;
  for(i=0;i<n;i++){
    scanf("%d",&a[i]);
    sum+=a[i];
  }
  sou=(double)1/(4*m);
  for(i=0;i<n;i++){
    s=(double)a[i]/sum;
    if(s>=sou) ans++;
  }
  if(ans>=m) printf("Yes");
  else printf("No");
  return 0;
}