#include<stdio.h>

int main(void)
{
	int N, M;
	scanf("%d%d", &N, &M);
	int A[N],i,sum=0;
	for (i = 0; i < N; i++) {
		scanf("%d",& A[i]);
		sum += A[i];
	}
	int flag = 0;
	for (i = 0; i < N; i++) {
		if (A[i] >= sum / (4 * M)) flag++;
	}
	if (flag >= M) printf("Yes");
	else printf("No");

	return 0;
}