# Reverse Engineering

<table><thead><tr><th width="347">Challenge</th><th>Link</th></tr></thead><tbody><tr><td>sanity_check (223 pts)</td><td></td></tr><tr><td>simple_encrypt (413 pts)</td><td></td></tr><tr><td>Flag Keeper (496 pts) UPSOLVE</td><td></td></tr><tr><td>Flag Checker (500 pts) UPSOLVE</td><td></td></tr></tbody></table>

## ? (? pts)

### Description

### Solution
