Updates reverse-engineering.md

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Author: mzhang28

hello-world-100-points.md

@@ -4,8 +4,8 @@ This category challenges your deductive ability to use a program's behavior and
 
 * Hexable \[25 points\]
 * Phunky Python I \[30 points\]
-* Useless Python \[50 points\]
-* Phunky Python II \[115 points\]
+* [Useless Python \[50 points\]](//reverse-engineering/useless-python-50-points.md)
+* [Phunky Python II \[115 points\]](//reverse-engineering/phunky-python-ii-115-points.md)
 * Lucky Guess \[200 points\]
 * Hex QR \[200 points\]
 * [67k \[400 points\]](/reverse-engineering/67k-400-points.md)