#include <stdio.h>

int a[100];
int main() {
  int n, m;
  scanf("%d %d", &n, &m);
  for (int i = 0; i < n; i++) {
    scanf("%d", &a[i]);
  }
  int sum = 0;
  for (int i = 0; i < n; i++) {
    sum += a[i];
  }
  int selected = 0;
  for (int i = 0; i< n; i++) {
    if (a[i] >= sum / (4 * m)) {
      selected++;
    }
  }
  printf("%s", selected >= m ? "Yes" : "No");
}