compile visual studio c++ online

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#include <boost/filesystem.hpp>
#include <vector>
#include <iostream>

namespace fs = boost::filesystem;
int main()
{
    std::vector<fs::path> v = {
       "D:\\Portables\\REAPER\\_TEST PROJECT\\..\\name.wav",
       "D:\\Portables\\REAPER\\..\\_TEST PROJECT\\name.wav",
       "D:\\Portables\\REAPER\\..\\..\\_TEST PROJECT\\name.wav",
       "D:\\Portables\\REAPER\\..\\..\\_TEST PROJECT\\..\\name.wav",
       "D:\\Portables\\..\\REAPER\\..\\..\\_TEST PROJECT\\..\\name.wav",
       "D:\\Portables\\REAPER\\_TEST PROJECT\\name.wav\\.."};

for(fs::path p: v) {
        std::cout << p << " -> ";
        fs::path root = p.is_absolute() ? p.root_path() : absolute(p).root_path();
        fs::path result;
        for(fs::path f: absolute(p)) {
            if(f == ".") {
                continue;
            } else if(f == "..") {
                if(result == root) {
                    result.clear();
                    break;
                } else {
                   result.remove_filename();
                }
                continue;
            } else {
                result /= f;
            }
        }
        std::cout << result << '\n';
    }
}

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Compilation time: 2.1 sec, absolute running time: 0.33 sec, absolute service time: 2.46 sec