Compilare: main.cpp: In constructor 'Node::Node()': main.cpp:18:38: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(son, NULL, sizeof(son)); ^ main.cpp: In member function 'void AHO::ins(Node*, int, std::__cxx11::string&, int)': main.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == str.size()) { ~~~~^~~~~~~~~~~~~ main.cpp:37:29: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod -> son[ch] == NULL) { ^ main.cpp:38:30: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> son[ch] = new Node; ^ main.cpp:40:30: warning: array subscript has type 'char' [-Wchar-subscripts] ins(nod -> son[ch], pos + 1, str, id); ^ main.cpp: In member function 'void AHO::bfs()': main.cpp:49:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < Q.size()) { ~~~~^~~~~~~~~~ main.cpp: In member function 'void AHO::solve(std::__cxx11::string&)': main.cpp:70:47: warning: array subscript has type 'char' [-Wchar-subscripts] while(nod != root && nod -> son[ch] == NULL) { ^ main.cpp:73:29: warning: array subscript has type 'char' [-Wchar-subscripts] if(nod -> son[ch] != NULL) { ^ main.cpp:74:36: warning: array subscript has type 'char' [-Wchar-subscripts] nod = nod -> son[ch]; ^