Compilare: main.cpp: In function 'bool search(nod*, const std::string&)': main.cpp:41:30: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 41 | if(curr->fi[c - 'a'] = nullptr) | ~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp: In function 'nod* del(nod*, std::string, int)': main.cpp:60:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if(depth == key.size()) | ~~~~~~^~~~~~~~~~~~~