#include<bits/stdc++.h>
using namespace std;
int main(){
    int m,n;
    cin>>n>>m;
    int c = 0;
  	long a[n];
  	for(int i=0;i<n;i++) cin>> a[i];
  	double votes = accumulate(a,a+n,0);
  	for(int i =0;i<n;i++) if(a[i] >=(double)(votes/(m*4)) ) c++;
	if(c<m) cout<< "No";
  	else cout << "Yes";
}