Added matrix multiplication algo in dynamic programming

[MishtiGarg250]

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Added Matrix multiplication algorithm in dynamic programming

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 85.96%. Comparing base (08d8c6b) to head (3d8f28c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1830      +/-   ##
==========================================
+ Coverage   85.91%   85.96%   +0.04%     
==========================================
  Files         379      380       +1     
  Lines       19778    19841      +63     
  Branches     3015     3024       +9     
==========================================
+ Hits        16993    17056      +63     
  Misses       2785     2785              

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