Compilare: main.cpp: In function 'std::vector<int> kmp(const std::string&)': main.cpp:16:27: 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 = 1; i < str.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp: In function 'void test_case()': main.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i = 0; i < pfx_func.size(); i++) { | ~~^~~~~~~~~~~~~~~~~