Compilare: main.cpp: In function 'void kmp(std::string&)': main.cpp:15:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i = 2 ; i < sir.size() ; ++ i) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int caut(std::vector<int>, int)': main.cpp:31:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if (step + ret < pos.size() && pos[step + ret] < val) { | ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'bool find(std::vector<int>, int, int)': main.cpp:41:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if (last_less_than_left < pos.size()) { | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:9: warning: unused variable 'finish' [-Wunused-variable] 54 | int finish = lps[len - 1] ; | ^~~~~~