Compilare: main.cpp: In function 'std::vector<int> prefix(const string&)': main.cpp:29:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i=2;i<=A.size();i++){ | ~^~~~~~~~~~ main.cpp: In function 'std::vector<int> KMP(const string&, const string&)': main.cpp:41:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i=1;i<=A.size();i++){ | ~^~~~~~~~~~ main.cpp:44:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | if (k == B.size()){ | ~~^~~~~~~~~~~