Compilare: main.cpp: In function 'trieNode* getNode(trieNode*)': main.cpp:27:58: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(aux -> children, NULL, sizeof(aux -> children)); ^ main.cpp: In function 'void nrCuv(trieNode*&, std::__cxx11::string)': main.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (node -> depth > key.size()) ~~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:43:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (node -> depth > key.size()) ~~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (node -> depth == key.size()) ~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=start; i<key.size(); i++) ~^~~~~~~~~~~ main.cpp:68:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=it.second; j<cuv[it.first].size(); j++) ~^~~~~~~~~~~~~~~~~~~~~