update readme

README.md

@@ -3,7 +3,54 @@ CS50 — 2018 solutions
 
 Go ahead and take a peek at the solutions.
 
-- https://www.facebook.com/TNSlovakia/posts/758423431009895
-- https://www.facebook.com/mareksuscak/posts/10212448694424737
-- https://www.facebook.com/photo.php?fbid=10212767883924275&set=a.1747426837808.2090961.1002913113&type=3
-- https://www.facebook.com/vladimir.liulka/posts/1487077188057449
+## Table of Contents
+
+- [pset1](/pset1)
+  * [hello](/pset1/hello)
+  * [cash](/pset1/cash)
+  * [credit](/pset1/credit)
+  * mario
+    + [less](/pset1/mario/less)
+    + [more](/pset1/mario/more)
+- [pset2](/pset2)
+  * [caesar](/pset2/caesar)
+  * [vigenere](/pset2/vigenere)
+  * [crack](/pset2/crack)
+- [pset3](/pset3)
+  * [music](/pset3/music)
+- [pset4](/pset4)
+  * [whodunit](/pset4/whodunit)
+  * resize
+    + [less](/pset4/resize/less)
+    + [more](/pset4/resize/more)
+  * [recover](/pset4/recover)
+- [pset5](/pset5)
+  * [speller](/pset5/speller)
+    + [hashtable](/pset5/speller/hashtable)
+    + [trie](/pset5/speller/trie)
+    + [bloom filter](/pset5/speller/bloom)
+- [pset6](/pset6)
+  * [sentimental](/pset6/sentimental)
+    + [hello](/pset6/sentimental/hello)
+    + [cash](/pset6/sentimental/cash)
+    + [credit](/pset6/sentimental/credit)
+    + mario
+      - [less](/pset6/sentimental/mario/less)
+      - [more](/pset6/sentimental/mario/more)
+    + [caesar](/pset6/sentimental/caesar)
+    + [vigenere](/pset6/sentimental/vigenere)
+    + [crack](/pset6/sentimental/crack)
+  * [similarities](/pset6/similarities)
+    + [less](/pset6/similarities/less)
+    + [more](/pset6/similarities/more)
+- [pset7](/pset7)
+  * [finance](/pset7/similarities)
+- [pset8](/pset8)
+  * [mashup](/pset8/mashup)
+
+## Links
+
+- [An official announcement](https://www.facebook.com/TNSlovakia/posts/758423431009895)
+- [My personal announcement](https://www.facebook.com/mareksuscak/posts/10212448694424737)
+- [My certificate of gratitude](https://www.facebook.com/photo.php?fbid=10212767883924275&set=a.1747426837808.2090961.1002913113&type=3)
+- [Prof. David J. Malan's greets graduates of the first CS50 batch in Slovakia](https://www.facebook.com/vladimir.liulka/posts/1487077188057449)