Compilare: main.cpp: In function 'void trans(std::__cxx11::string&)': main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'bool cmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size() && i < b.size(); i++) ~~^~~~~~~~~~ main.cpp:42:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size() && i < b.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'void create(Trie*, int, std::__cxx11::string, int)': main.cpp:56:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz == s.size()) ~~~~^~~~~~~~~~~ main.cpp: In function 'std::__cxx11::string query(Trie*, int, std::__cxx11::string, std::__cxx11::string)': main.cpp:88:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz == s.size()) ~~~~^~~~~~~~~~~