Compilare: main.cpp: In function 'void Insert(std::string&, Trie*, int)': main.cpp:34:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if(pos == w.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'void Delete(std::string&, Trie*, int)': main.cpp:51:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | if(pos == w.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int Query1(std::string&, Trie*, int)': main.cpp:67:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | if(pos == w.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int Query2(std::string&, Trie*, int)': main.cpp:82:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | if(pos == w.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int Query1(std::string&, Trie*, int)': main.cpp:77:11: warning: control reaches end of non-void function [-Wreturn-type] 77 | Query1(w,node->sons[w[pos]-'a'],pos+1); | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int Query2(std::string&, Trie*, int)': main.cpp:91:11: warning: control reaches end of non-void function [-Wreturn-type] 91 | Query2(w,node->sons[w[pos]-'a'],pos+1); | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~