Add algorithms in C, C++, Java, Python, Ruby, Dart (advanced)

[hhhrrrttt222111]

[NitikaGupta16]

@hhhrrrttt222111 I want to add graph algorithms. Please assign me this issue.

[goverdhan07]

@hhhrrrttt222111 i want to add kadane's algorithm. Please assign me this issue. Thanks!

[hhhrrrttt222111]

@hhhrrrttt222111 i want to add kadane's algorithm. Please assign me this issue. Thanks!

Will merge PR