#include <assert.h>
#include <stdio.h>

int main() {
  int n, m, a[100], r = 0, sum = 0, min;
  assert(scanf("%d %d", &n, &m) == 2);
  for (int i = 0; i < n; i++) {
    assert(scanf("%d", &a[i]) == 1);
    sum += a[i];
  }
  min = (sum + 4 * m - 1) / (4 * m);
  for (int i = 0; i < n; i++) {
    if (a[i] >= min) {
      r++;
    }
    if (r >= m) {
      break;
    }
  }
  puts(r >= m ? "Yes" : "No");
}
