Compilare: user.cpp: In function ‘void addWord(Node*, std::string&, int)’: user.cpp:31:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < word.size(); i++) ^ user.cpp: In function ‘void solve(std::string&, std::vector<std::basic_string<char> >&)’: user.cpp:86:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dictionary.size(); i++) ^ user.cpp:91:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dictionary.size(); i++) ^ user.cpp:97:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < text.size(); i++) ^ user.cpp:113:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dictionary.size(); i++) ^