[https://room2042.rip/writeup/2021-07-24-google_ctf-david_and_the_tree/](https://room2042.rip/writeup/2021-07-24-google_ctf-david_and_the_tree/)

Original writeup (https://room2042.rip/writeup/2021-07-24-google_ctf-david_and_the_tree/).