lowest common ancestor in bt (dsa 450)

[dhruvin5]

Related Issue

• Info about the related issue Provided solution of the problem Lowest common ancestor of binary tree of DSA 450 Closes: #516

Describe the changes you've made

C++ solution (with commented explanations) of DSA 450 problem Lowest common ancestor of binary tree I have created a c++ file in the DSA folder/Binary trees with the same name as that of the problem I have also updated the readme

Mention any unusual behaviour of your code (Write NA if not)

Any unusual behaviour of your code

Checklist:

(To mark, write x inside the square brackets like this: [x])

• [x] My code follows the guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly whereever it was hard to understand.
• [x] My changes generate no new warnings.

Additional Info (optional)

Any additional information you want to give

[dhruvin5]

Can you please check this @kanak22

[dhruvin5]

okayy

[dhruvin5]

I made the changes @kanak22