#include<bits/stdc++.h>
using namespace std;
vector<int> V;
int main()
{
  int N,M;
  cin>>N>>M;
  int Sum=0;
  while(N--)
  {
    int X;
    cin>>X;
    Sum+=X;
    V.push_back(X);
  }
  sort(V.rbegin(),V.rend());
  if(V[M-1]>=(Sum+(4*M)-1)/(4*M))
    puts("Yes");
  else	puts("No");
  return 0;
}
