#include<stdio.h>

int main(void)
{
  int n.m,s,t;
  int total=0;
  int a[1000];
  double u;
  
  scanf("%d %d",&n, &m);
  for(S=0;s<n;s++){
    scanf("%d",a[n]);
    total=total+a[n];
  }
  
  u=1/(4*m);
  
  for(s=0;s<n;s++){
    if(a[n]>=total*u){
      t++;
    }
  }
  
  if(t>=m)
    put("Yes");
  else
    put("No");
  
  return 0;
}