Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > makeChessLines(std::__cxx11::string&, bool)': main.cpp:70:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < W0.size(); i++) ~~^~~~~~~~~~~ main.cpp: In function 'void makeMoves(std::__cxx11::string&, char, std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:81:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < minRot.size(); i++) ~~^~~~~~~~~~~~~~~