Flatten a binary tree into linked list.cpp

Pheonix-001 / Hacktoberfest_2022

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Closed sahilsharma029 closed 2 years ago

sahilsharma029 commented 2 years ago

Flatten a binary tree into a linked list using c++

please merge it and also add tags of hacktoberfest

I am a newbie to hactoberfest.

If I made any mistake so please ignore it and accept my PR