[Rishavbhattarai]

Two bugs in searches/RabinKarpAlgorithm.search:

1. The rolling hash is an int, so ALPHABET_SIZE * hash overflows for large primes. With the common prime 1_000_000_007, I checked 5,000 random lowercase texts against a pattern taken from each one, and 1,110 returned the wrong index. Example: search("jggw", "nzdjsjggwx", 1_000_000_007) returns -1 instead of 5. The hashes are now long.
2. When the pattern is longer than the text, the first hash loop reads past the end of the text: search("ABC", "AB", 101) throws StringIndexOutOfBoundsException. It now returns -1.

Both cases are added to the existing parameterized test and fail on master.

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations. (No new algorithm.)
• All new algorithms include a corresponding test class that validates their functionality. (Regression test added.)
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.26%. Comparing base (e6b2ecb) to head (c2304f0).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7665      +/-   ##
============================================
- Coverage     82.26%   82.26%   -0.01%     
+ Complexity     8408     8406       -2     
============================================
  Files           843      843              
  Lines         26140    26142       +2     
  Branches       5100     5101       +1     
============================================
  Hits          21505    21505              
  Misses         3843     3843              
- Partials        792      794       +2     

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[DenizAltunkapan]

clean implementation, thank you. @Rishavbhattarai