Compilare: main.cpp: In member function 'std::vector<int> AC_automaton::Union(std::vector<int>&, std::vector<int>&)': main.cpp:21:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | while(st < a.size() && dr < b.size()) | ~~~^~~~~~~~~~ main.cpp:21:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | while(st < a.size() && dr < b.size()) | ~~~^~~~~~~~~~ main.cpp:27:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | while(st < a.size()) | ~~~^~~~~~~~~~ main.cpp:30:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(dr < b.size()) | ~~~^~~~~~~~~~ main.cpp: In member function 'void AC_automaton::sendAparitii(std::string&, int*)': main.cpp:104:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | for(int i = 0; i < sir.size(); i++) | ~~^~~~~~~~~~~~