#include<bits/stdc++.h>
using namespace std;
int main()
{
	int m,n,s=0;
	cin>>n>>m;
	int a[n+1];
	int i;
	for(i=0;i<n;i++)
	{
		cin>>a[i];
		s+=a[i];
	}
	sort(a,a+n);
	for(i=n-1;i>=n-m;i--)
	{
		if(a[i]*4*m<s)
		break;
	}
	if(i==(n-1-m))
	cout<<"Yes"<<endl;
	else
	cout<<"No"<<endl;
	return 0;
}