#include <iostream>
#include <algorithm>

int main()
{
	int M, N, * A,X=0;
	std::cin >> N >> M;
	A = new int[N];
	for (int i = 0; i < N; i++)
	{
		std::cin >> A[i];
		X += A[i];
	}
	std::sort(A, A + N);
	if (A[N - M]<1.0*X/4/M) {
		std::cout << "No";
	}
	else {
		std::cout << "Yes";
	}
	delete[] A;
}