Compilare: main.cpp: In constructor 'Aho::Aho()': main.cpp:13:38: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(son, NULL, sizeof(son)); ^ main.cpp:14:38: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(nxt, NULL, sizeof(nxt)); ^ main.cpp:15:40: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(from, NULL, sizeof(from)); ^ main.cpp: In function 'void add(Aho*, std::__cxx11::string&, int, int)': main.cpp:27:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(str.size() == p) { ~~~~~~~~~~~^~~~ main.cpp: In function 'void bfs()': main.cpp:46:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p < Q.size()) { ~~^~~~~~~~~~