//#include<bits/stdc++.h>
#include<stdio.h>
//#include<vector>
//using namespace std;
int main()
{

 int n,m;
 int sum=0;
 scanf("%d%d",&n,&m);

int v[n];

for(int i=0;i<n;i++)
{
	scanf("%d",&v[i]);
	sum+=v[i];
}

//cout<<sum<<endl;

int k=sum/(4*m);
//cout<<k<<endl;

//sort(v.begin(),v.end());


int a=0;
	 
for(int i=0;i<n;i++)
{
	if(v[i]>k)
		a++;
}
//cout<<a<<endl;

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


	return 0;}
