# 06

The naive way to do it would be to keep a list. A way more performant ways way to do this is just having an array with 9 entries (0-8) which count the states of the fish. Then you actually just rotate the array each day and add the `0` entry to the `6` additionally.

<details>
  <summary>Solutions</summary>
  <ol>
    <li>352195</li>
    <li>1600306001288</li>
  </ol>
</details>