#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main()
{
	int n,m;
	if (scanf("%d %d", &n, &m));

	int i;
	int sum = 0;
	int array[n];
	memset(array, 0, sizeof(array));
	for (i=0; i<n; i++) {
		if (scanf("%d", &array[i]))
		sum += array[i];
	}

	int cnt = 0;
	for (i=0; i<n; i++) {
		if ((sum / (m * 4)) <= array[i]) {
			cnt++;
		}
	}

	printf("%s", (m <= cnt)? "Yes" : "No");

	return 0;
}