#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;
int main(){
	int n,k;cin>>n>>k;
	int a[1005]={0};
	int sum=0;
	for(int i=1;i<=n;i++) cin>>a[i],sum+=a[i];
	sort(a+1,a+n+1);
	if(a[n-k+1]>=ceil(double(sum)/(4*k))) cout<<"Yes";
	else cout<<"No";
	return 0;
}