Link questions on hash mapping and graphs.

Hey if it would be really thankful if you could share somelinks of questions from previous contests and practice section pertaining to hashing and graphs.

The following link has a wonderful collection of tutorials and problems relating to wide variety of topics in algorithms:

At serial number 27, you will find graphs (materials and problems).
As far as hashing is related, go through the Rabin-Karp algorithm, listed at sixth position.

Also, the following link has some nice examples (solved problems) and explanations related to hashing:

You may find below link useful:

@mansigupta19 basic graph algo related problems - general - CodeChef Discuss