Compilare: main.cpp: In constructor 'Trie::Trie()': main.cpp:29:34: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(next, NULL, sizeof(next)); ^ main.cpp: In member function 'void Trie::add(std::__cxx11::string, int)': main.cpp:37:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == word.size()) ~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::erase(std::__cxx11::string, int)': main.cpp:53:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == word.size()) ~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::find(std::__cxx11::string, int)': main.cpp:72:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos != word.size()) ~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::lcp(std::__cxx11::string, int)': main.cpp:90:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos != word.size()) ~~~~^~~~~~~~~~~~~~