#include<iostream>
#include <algorithm>
using namespace std;
int main(){
	int n, m, sum;
	int a[1005];
	cin >> n >> m;
	sum=0;
	for(int i=0;i<n;i++){
		cin >> a[i];
		sum+=a[i];
	}
	sort(a,a+n);
	if(a[n-m]>=(sum*1.0/(4*m)))cout << "Yes" << endl;
	else cout << "No" << endl;
}