#include <stdio.h>

int main(void)
{
	int n, m, l, flag, voteSum;
	int ai[1000];
	int i;

	scanf("%d%d", &n, &m);

	voteSum = 0;

	for (i = 0; i < n; i++)
	{
		scanf("%d", &ai[i]);
		voteSum += ai[i];
	}

	l = voteSum / (4 * m);
	flag = 0;

	for (i = 0; i < n; i++)
	{
		if (ai[i] >= l)
		{
			flag++;
		}
	}

	if (flag > m)
	{
		printf("Yes\n");
	}
	else
	{
		printf("No\n");
	}

	return 0;
}