#include <stdio.h>


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