Compilare: main.cpp: In function 'void kmp(int*, std::__cxx11::string&)': main.cpp:20:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<s.length(); i++){ ~^~~~~~~~~~~ main.cpp: In function 'std::pair<int, std::vector<int> > match(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=lp+1; i<s.length(); i++){ ~^~~~~~~~~~~