Compilare: main.cpp: In constructor 'Hasher::Hasher(const string&)': main.cpp:46:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < hh.size(); i++) { ~~^~~~~~~~~~~ main.cpp: In function 'int solve(const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:101:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < sortat.size() - 1; ++k) { ~~^~~~~~~~~~~~~~~~~~~