Compilare: main.cpp: In function 'void kmp(std::string&)': main.cpp:16:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 2, finish = 0 ; i < sir.size() ; ++ i) { | ~~^~~~~~~~~~~~ main.cpp:25:21: 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 + len < sir.size()) { | ~~~~~~~~^~~~~~~~~~~~