#include<stdio.h>

int main() {
	int n[100], m, num, sum = 0, rez = 0;
	int flag = 0;

	scanf_s("%d", &num);
	scanf_s("%d", &m);

	for (int i = 0; i < num; i++) {
		scanf("%d", &n[i]);
		sum += n[i];
	}
	rez = sum / (4 * m);

	for (int i = 0; i < num; i++) 
		if (n[i] >= rez) 
			flag++; 

	if (flag >= m) {
		printf("Yes ");
	}
	else {
		printf("No ");
	}
	
	 return 0;
}