Compilare: main.cpp: In function 'void Insert(Trie*, char*)': main.cpp:37:18: warning: NULL used in arithmetic [-Wpointer-arith] while (*w != NULL) ^~~~ main.cpp: In function 'int main()': main.cpp:51:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:55:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n%s", W); ^