#include <stdio.h>

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

  is_false = 0;
  for (int i = 0; i < n; i++) {
    if ( a[i] < number  / (4 * m) ) {
      is_false++;
    }
  }

  if (n - is_false >= m) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}