Compilare: main.cpp: In function 'void add(Tnode*, std::string, int)': main.cpp:25:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | if(i == p.size()) | ~~^~~~~~~~~~~ main.cpp:28:22: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | int ind = fr[p[i]]; | ^ main.cpp: In function 'bool inside(std::string, std::string)': main.cpp:38:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(ok < a.size() && a[ok] == b[ok]) ok ++; | ~~~^~~~~~~~~~ main.cpp:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | return (ok == a.size()); | ~~~^~~~~~~~~~~