#include <stdio.h>

int main(void){

  long n,m;
  scanf("%ld %ld", &n, &m);

  long a[n];
	for (long i = 0; i < n; i++) {
		scanf("%ld", &a[i]);
	}

	long all = 0;
	for (long i = 0; i < n; i++) {
		all += a[i];
	}

	long avobe = 0;
	for (long i = 0; i < n; i++) {
		if (a[i] >= all/(4*m)) {
			avobe++;
		}
	}

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

  return 0;
}