Longest Increasing Subsequence dp solution

[akulagrawal]

lis (longest increasing subsequence) dp solution added

[abranhe]

Hi, @akulagrawal thanks for opening a pull request, the algorithm implementation its perfectly ok, but it follows C style instead of C++

Eg:

C++	C
#include <iostream>	#include <stdio.h>
std::cout	printf

Those are ok, but it should be better if you use C++ instead of C. You can also open a pull request on github.com/allalgorithms/c adding exactly this file.