Compilare: main.cpp: In function 'void getPi(const string&)': main.cpp:47:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for (int i = 1; i < pat.size(); i++) | ~~^~~~~~~~~~~~ main.cpp: In function 'void kmp()': main.cpp:59:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for (int i = 0; i < txt.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:65:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | if (j == pat.size()) | ~~^~~~~~~~~~~~~