HPX is “The C++ Standards Library for Concurrency and Parallelism”. So, implementing C++17 parallelism like N4409 is very important. Most of parallel algorithms are already implemented. But, still some algorithms have not been implemented. My main objective is implementing as many as possible of the remaining parallel algorithms and adapt them to Ranges TS and add container versions of them. And I add unit tests and benchmark codes for them. Associated with mainly parallel algorithms, I also catch and suggest many issues and resolve them.