#include<stdio.h>

int main() {
	int n = 0;
	int m = 0;
	int c = 0;
	int t = 0;
	int v[101];
	scanf("%d %d", &n, &m);
	for (int i = 0; i < n; i++) {
		scanf("%d", &v[i]);
	}
	for (int i = 0; i < n; i++) {
		t = t + v[i];
	}
	for (int i = 0; i < n; i++) {
		if (v[i] >= t / (4 * m)) {
			c = c + 1;
		}
	}
	if (c >= m) {
		printf("Yes");
	}
	else {
		printf("No");
	}
	return 0;
}