Implement "Stock Span problem" in C++.

[archana-9430]

The stock span is a financial problem, where we need calculate span of stock's price for n days.

[archana-9430]

Assign this issue to me, I'll implement this.

[rishiraj001]

Assign the issue to me i will write the code as well as explanation line by line.

[maanya268]

Please assign it to me.

[ankur7864]

Sir please Assign the issue to me

[Rishabh062]

@archana-9430 I assign this task to you, because you have asked it first. Kindly write clean code with explanation, time complexity and problem statement

[archana-9430]

@archana-9430 I assign this task to you, because you have asked it first. Kindly write clean code with explanation, time complexity and problem statement

@Rishabh062 Okay, thanks. I'll do that.

[archana-9430]

@archana-9430 I assign this task to you, because you have asked it first. Kindly write clean code with explanation, time complexity and problem statement

@Rishabh062 Okay, thanks. I'll do that.

@Rishabh062 Check PR #336. I have added the Question link, Problem statement, Input, Output, Different Approaches(with their TC & SC), and the Final C++ code.
Do let me know, if some improvements are needed.