Compilare: main.cpp: In function 'void Insert(Trie*, char*)': main.cpp:37:15: warning: NULL used in arithmetic [-Wpointer-arith] if (*w == NULL) ^~~~ main.cpp: In function 'int main()': main.cpp:48:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:52:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n%s", W); ^