#include<stdio.h>
int main()
{
	int n, m;
	scanf("%d %d", &n, &m);
	int i;
	int a[102];
	for (i = 0; i < n; i++)
		scanf("%d", &a[i]);
	int sum = 0;
	for (i = 0; i < n; i++)
		sum += a[i];
	sum /= 4 * m;
	int cnt = 0;
	for (i = 0; i < n; i++)
		if (a[i] >= sum)
			cnt++;
	if (cnt < m)
		printf("No\n");
	else
		printf("Yes\n");
	return 0;
}