#include <stdio.h>

int main() {
  int n, m, number = 0, is_true = 0;
  scanf("%d %d\n", &n, &m);
  int a[n];
  
  for (int i = 0; i < n; i++) {
    scanf("%d", &a[i]);  
    number += a[i];
  }

  for (int i = 0; i < n; i++) {
    if (a[i] >= number / (4 * m)) {
      is_true++;
    }
  }
  if (is_true >= m && is_true <= n) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}