Compilare: main.cpp: In function 'void calcLPS(std::__cxx11::string)': main.cpp:27:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < pat.size()) ~~^~~~~~~~~~~~ main.cpp: In function 'void kmpSearch(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:53:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < haystack.size()) ~~^~~~~~~~~~~~~~~~~ main.cpp:64:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == needle.size()) { ~~^~~~~~~~~~~~~~~~ main.cpp:70:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~