Adding topic wise questions

[MillennialPirate]

Adding topic wise questions would help in finding the pattern behind the problems and hence resulting in easily cracking a similar question in the coding rounds of the company. Along with this, it can be really helpful if the edge cases or corner cases of a particular program are provided. I would like to contribute to the above issues by providing solutions in C++ as it is the most common language which candidates prefer for coding interviews.
Regards,
Siddharth.